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Finding the Fourth Proportional to 42,138.70, 63,217.46 and 15,843.67

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Solution

The fourth proportional to 42,138.70, 63,217.46 and 15,843.67 is: 23,769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.70 : 63,217.46 = 15,843.67 : x
  2. Step 2: Convert to fraction form
    42,138.70/63,217.46 = 15,843.67/x
  3. Step 3: Cross multiply
    42,138.70x = 63,217.46 × 15,843.67
  4. Step 4: Simplify right side
    42,138.70x = 1,001,596,456.04
  5. Step 5: Solve for x
    x = 1,001,596,456.04/42,138.70
  6. Step 6: Final answer
    x = 23,769.04

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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.