Home / 20,877.09-28,810.74-11,317.17

Finding the Fourth Proportional to 20,877.09, 28,810.74 and 11,317.17

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Solution

The fourth proportional to 20,877.09, 28,810.74 and 11,317.17 is: 15,617.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.09 : 28,810.74 = 11,317.17 : x
  2. Step 2: Convert to fraction form
    20,877.09/28,810.74 = 11,317.17/x
  3. Step 3: Cross multiply
    20,877.09x = 28,810.74 × 11,317.17
  4. Step 4: Simplify right side
    20,877.09x = 326,055,967.17
  5. Step 5: Solve for x
    x = 326,055,967.17/20,877.09
  6. Step 6: Final answer
    x = 15,617.88

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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.