Home / 42,220.28-63,347.85-18,515.55

Finding the Fourth Proportional to 42,220.28, 63,347.85 and 18,515.55

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Solution

The fourth proportional to 42,220.28, 63,347.85 and 18,515.55 is: 27,780.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,220.28 : 63,347.85 = 18,515.55 : x
  2. Step 2: Convert to fraction form
    42,220.28/63,347.85 = 18,515.55/x
  3. Step 3: Cross multiply
    42,220.28x = 63,347.85 × 18,515.55
  4. Step 4: Simplify right side
    42,220.28x = 1,172,920,284.07
  5. Step 5: Solve for x
    x = 1,172,920,284.07/42,220.28
  6. Step 6: Final answer
    x = 27,780.97

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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.