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Finding the Fourth Proportional to 8,704.80, 12,007.14 and 5,165.50

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Solution

The fourth proportional to 8,704.80, 12,007.14 and 5,165.50 is: 7,125.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704.80 : 12,007.14 = 5,165.50 : x
  2. Step 2: Convert to fraction form
    8,704.80/12,007.14 = 5,165.50/x
  3. Step 3: Cross multiply
    8,704.80x = 12,007.14 × 5,165.50
  4. Step 4: Simplify right side
    8,704.80x = 62,022,881.67
  5. Step 5: Solve for x
    x = 62,022,881.67/8,704.80
  6. Step 6: Final answer
    x = 7,125.14

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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.