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Finding the Fourth Proportional to 8,607.68, 12,886.56 and 7,291.52

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Solution

The fourth proportional to 8,607.68, 12,886.56 and 7,291.52 is: 10,916.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.68 : 12,886.56 = 7,291.52 : x
  2. Step 2: Convert to fraction form
    8,607.68/12,886.56 = 7,291.52/x
  3. Step 3: Cross multiply
    8,607.68x = 12,886.56 × 7,291.52
  4. Step 4: Simplify right side
    8,607.68x = 93,962,609.97
  5. Step 5: Solve for x
    x = 93,962,609.97/8,607.68
  6. Step 6: Final answer
    x = 10,916.14

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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.