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Finding the Fourth Proportional to 15,007.68, 20,712.78 and 8,723.52

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Solution

The fourth proportional to 15,007.68, 20,712.78 and 8,723.52 is: 12,039.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.68 : 20,712.78 = 8,723.52 : x
  2. Step 2: Convert to fraction form
    15,007.68/20,712.78 = 8,723.52/x
  3. Step 3: Cross multiply
    15,007.68x = 20,712.78 × 8,723.52
  4. Step 4: Simplify right side
    15,007.68x = 180,688,350.59
  5. Step 5: Solve for x
    x = 180,688,350.59/15,007.68
  6. Step 6: Final answer
    x = 12,039.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.