Home / 28,115.55-38,793.78-16,781.40

Finding the Fourth Proportional to 28,115.55, 38,793.78 and 16,781.40

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Solution

The fourth proportional to 28,115.55, 38,793.78 and 16,781.40 is: 23,154.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.55 : 38,793.78 = 16,781.40 : x
  2. Step 2: Convert to fraction form
    28,115.55/38,793.78 = 16,781.40/x
  3. Step 3: Cross multiply
    28,115.55x = 38,793.78 × 16,781.40
  4. Step 4: Simplify right side
    28,115.55x = 651,013,939.69
  5. Step 5: Solve for x
    x = 651,013,939.69/28,115.55
  6. Step 6: Final answer
    x = 23,154.94

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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.