Home / 42,320.80-63,497.40-18,930.43

Finding the Fourth Proportional to 42,320.80, 63,497.40 and 18,930.43

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Solution

The fourth proportional to 42,320.80, 63,497.40 and 18,930.43 is: 28,402.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,320.80 : 63,497.40 = 18,930.43 : x
  2. Step 2: Convert to fraction form
    42,320.80/63,497.40 = 18,930.43/x
  3. Step 3: Cross multiply
    42,320.80x = 63,497.40 × 18,930.43
  4. Step 4: Simplify right side
    42,320.80x = 1,202,033,085.88
  5. Step 5: Solve for x
    x = 1,202,033,085.88/42,320.80
  6. Step 6: Final answer
    x = 28,402.89

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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.