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Finding the Fourth Proportional to 12,487.24, 18,730.86 and 3,721.24

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Solution

The fourth proportional to 12,487.24, 18,730.86 and 3,721.24 is: 5,581.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.24 : 18,730.86 = 3,721.24 : x
  2. Step 2: Convert to fraction form
    12,487.24/18,730.86 = 3,721.24/x
  3. Step 3: Cross multiply
    12,487.24x = 18,730.86 × 3,721.24
  4. Step 4: Simplify right side
    12,487.24x = 69,702,025.47
  5. Step 5: Solve for x
    x = 69,702,025.47/12,487.24
  6. Step 6: Final answer
    x = 5,581.86

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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.