Home / 15,215,098,016.49-20,988,111,722.95-9,489,441,998.69

Finding the Fourth Proportional to 15,215,098,016.49, 20,988,111,722.95 and 9,489,441,998.69

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Solution

The fourth proportional to 15,215,098,016.49, 20,988,111,722.95 and 9,489,441,998.69 is: 13,089,989,209.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215,098,016.49 : 20,988,111,722.95 = 9,489,441,998.69 : x
  2. Step 2: Convert to fraction form
    15,215,098,016.49/20,988,111,722.95 = 9,489,441,998.69/x
  3. Step 3: Cross multiply
    15,215,098,016.49x = 20,988,111,722.95 × 9,489,441,998.69
  4. Step 4: Simplify right side
    15,215,098,016.49x = 199,165,468,856,959,696,896
  5. Step 5: Solve for x
    x = 199,165,468,856,959,696,896/15,215,098,016.49
  6. Step 6: Final answer
    x = 13,089,989,209.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.