Home / 53,864.16-80,781.12-20,561.28

Finding the Fourth Proportional to 53,864.16, 80,781.12 and 20,561.28

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Solution

The fourth proportional to 53,864.16, 80,781.12 and 20,561.28 is: 30,836.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,864.16 : 80,781.12 = 20,561.28 : x
  2. Step 2: Convert to fraction form
    53,864.16/80,781.12 = 20,561.28/x
  3. Step 3: Cross multiply
    53,864.16x = 80,781.12 × 20,561.28
  4. Step 4: Simplify right side
    53,864.16x = 1,660,963,227.03
  5. Step 5: Solve for x
    x = 1,660,963,227.03/53,864.16
  6. Step 6: Final answer
    x = 30,836.15

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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.