Home / 42,402.20-63,604.65-21,330.72

Finding the Fourth Proportional to 42,402.20, 63,604.65 and 21,330.72

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Solution

The fourth proportional to 42,402.20, 63,604.65 and 21,330.72 is: 31,996.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,402.20 : 63,604.65 = 21,330.72 : x
  2. Step 2: Convert to fraction form
    42,402.20/63,604.65 = 21,330.72/x
  3. Step 3: Cross multiply
    42,402.20x = 63,604.65 × 21,330.72
  4. Step 4: Simplify right side
    42,402.20x = 1,356,732,979.85
  5. Step 5: Solve for x
    x = 1,356,732,979.85/42,402.20
  6. Step 6: Final answer
    x = 31,996.76

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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.