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Finding the Fourth Proportional to 8,607.68, 12,887.04 and 7,787.52

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Solution

The fourth proportional to 8,607.68, 12,887.04 and 7,787.52 is: 11,659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.68 : 12,887.04 = 7,787.52 : x
  2. Step 2: Convert to fraction form
    8,607.68/12,887.04 = 7,787.52/x
  3. Step 3: Cross multiply
    8,607.68x = 12,887.04 × 7,787.52
  4. Step 4: Simplify right side
    8,607.68x = 100,358,081.74
  5. Step 5: Solve for x
    x = 100,358,081.74/8,607.68
  6. Step 6: Final answer
    x = 11,659.13

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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.