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Finding the Fourth Proportional to 8,557.65, 11,815.14 and 7,659.87

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Solution

The fourth proportional to 8,557.65, 11,815.14 and 7,659.87 is: 10,575.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.65 : 11,815.14 = 7,659.87 : x
  2. Step 2: Convert to fraction form
    8,557.65/11,815.14 = 7,659.87/x
  3. Step 3: Cross multiply
    8,557.65x = 11,815.14 × 7,659.87
  4. Step 4: Simplify right side
    8,557.65x = 90,502,436.43
  5. Step 5: Solve for x
    x = 90,502,436.43/8,557.65
  6. Step 6: Final answer
    x = 10,575.62

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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.