Home / 42,006.60-63,000.72-13,920.12

Finding the Fourth Proportional to 42,006.60, 63,000.72 and 13,920.12

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Solution

The fourth proportional to 42,006.60, 63,000.72 and 13,920.12 is: 20,877.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,006.60 : 63,000.72 = 13,920.12 : x
  2. Step 2: Convert to fraction form
    42,006.60/63,000.72 = 13,920.12/x
  3. Step 3: Cross multiply
    42,006.60x = 63,000.72 × 13,920.12
  4. Step 4: Simplify right side
    42,006.60x = 876,977,582.49
  5. Step 5: Solve for x
    x = 876,977,582.49/42,006.60
  6. Step 6: Final answer
    x = 20,877.14

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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.