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Finding the Fourth Proportional to 8,558.60, 12,836.76 and 2,715.80

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Solution

The fourth proportional to 8,558.60, 12,836.76 and 2,715.80 is: 4,073.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,558.60 : 12,836.76 = 2,715.80 : x
  2. Step 2: Convert to fraction form
    8,558.60/12,836.76 = 2,715.80/x
  3. Step 3: Cross multiply
    8,558.60x = 12,836.76 × 2,715.80
  4. Step 4: Simplify right side
    8,558.60x = 34,862,072.81
  5. Step 5: Solve for x
    x = 34,862,072.81/8,558.60
  6. Step 6: Final answer
    x = 4,073.34

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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.