Home / 39,403.86-54,397.35-30,431.22

Finding the Fourth Proportional to 39,403.86, 54,397.35 and 30,431.22

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Solution

The fourth proportional to 39,403.86, 54,397.35 and 30,431.22 is: 42,010.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,403.86 : 54,397.35 = 30,431.22 : x
  2. Step 2: Convert to fraction form
    39,403.86/54,397.35 = 30,431.22/x
  3. Step 3: Cross multiply
    39,403.86x = 54,397.35 × 30,431.22
  4. Step 4: Simplify right side
    39,403.86x = 1,655,377,725.27
  5. Step 5: Solve for x
    x = 1,655,377,725.27/39,403.86
  6. Step 6: Final answer
    x = 42,010.55

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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.