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Finding the Fourth Proportional to 8,781.48, 13,120.68 and 8,475.24

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Solution

The fourth proportional to 8,781.48, 13,120.68 and 8,475.24 is: 12,663.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.48 : 13,120.68 = 8,475.24 : x
  2. Step 2: Convert to fraction form
    8,781.48/13,120.68 = 8,475.24/x
  3. Step 3: Cross multiply
    8,781.48x = 13,120.68 × 8,475.24
  4. Step 4: Simplify right side
    8,781.48x = 111,200,911.96
  5. Step 5: Solve for x
    x = 111,200,911.96/8,781.48
  6. Step 6: Final answer
    x = 12,663.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.