Home / 42,121.40-63,145.38-15,819.08

Finding the Fourth Proportional to 42,121.40, 63,145.38 and 15,819.08

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Solution

The fourth proportional to 42,121.40, 63,145.38 and 15,819.08 is: 23,714.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,121.40 : 63,145.38 = 15,819.08 : x
  2. Step 2: Convert to fraction form
    42,121.40/63,145.38 = 15,819.08/x
  3. Step 3: Cross multiply
    42,121.40x = 63,145.38 × 15,819.08
  4. Step 4: Simplify right side
    42,121.40x = 998,901,817.85
  5. Step 5: Solve for x
    x = 998,901,817.85/42,121.40
  6. Step 6: Final answer
    x = 23,714.83

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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.