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Finding the Fourth Proportional to 10,572.64, 15,855.70 and 8,487.72

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Solution

The fourth proportional to 10,572.64, 15,855.70 and 8,487.72 is: 12,728.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,572.64 : 15,855.70 = 8,487.72 : x
  2. Step 2: Convert to fraction form
    10,572.64/15,855.70 = 8,487.72/x
  3. Step 3: Cross multiply
    10,572.64x = 15,855.70 × 8,487.72
  4. Step 4: Simplify right side
    10,572.64x = 134,578,742.00
  5. Step 5: Solve for x
    x = 134,578,742.00/10,572.64
  6. Step 6: Final answer
    x = 12,728.96

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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.