Home / 12,487.30-18,731.91-3,721.54

Finding the Fourth Proportional to 12,487.30, 18,731.91 and 3,721.54

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Solution

The fourth proportional to 12,487.30, 18,731.91 and 3,721.54 is: 5,582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.30 : 18,731.91 = 3,721.54 : x
  2. Step 2: Convert to fraction form
    12,487.30/18,731.91 = 3,721.54/x
  3. Step 3: Cross multiply
    12,487.30x = 18,731.91 × 3,721.54
  4. Step 4: Simplify right side
    12,487.30x = 69,711,552.34
  5. Step 5: Solve for x
    x = 69,711,552.34/12,487.30
  6. Step 6: Final answer
    x = 5,582.60

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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.