Home / 20,086.51-30,117.61-8,991.13

Finding the Fourth Proportional to 20,086.51, 30,117.61 and 8,991.13

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Solution

The fourth proportional to 20,086.51, 30,117.61 and 8,991.13 is: 13,481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,086.51 : 30,117.61 = 8,991.13 : x
  2. Step 2: Convert to fraction form
    20,086.51/30,117.61 = 8,991.13/x
  3. Step 3: Cross multiply
    20,086.51x = 30,117.61 × 8,991.13
  4. Step 4: Simplify right side
    20,086.51x = 270,791,151.26
  5. Step 5: Solve for x
    x = 270,791,151.26/20,086.51
  6. Step 6: Final answer
    x = 13,481.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.