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Finding the Fourth Proportional to 15,029.68, 20,740.51 and 8,314.92

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Solution

The fourth proportional to 15,029.68, 20,740.51 and 8,314.92 is: 11,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,029.68 : 20,740.51 = 8,314.92 : x
  2. Step 2: Convert to fraction form
    15,029.68/20,740.51 = 8,314.92/x
  3. Step 3: Cross multiply
    15,029.68x = 20,740.51 × 8,314.92
  4. Step 4: Simplify right side
    15,029.68x = 172,455,681.41
  5. Step 5: Solve for x
    x = 172,455,681.41/15,029.68
  6. Step 6: Final answer
    x = 11,474.34

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Double scale
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Similar ratio
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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.