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Finding the Fourth Proportional to 10,662.60, 15,965.10 and 8,358.60

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Solution

The fourth proportional to 10,662.60, 15,965.10 and 8,358.60 is: 12,515.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,662.60 : 15,965.10 = 8,358.60 : x
  2. Step 2: Convert to fraction form
    10,662.60/15,965.10 = 8,358.60/x
  3. Step 3: Cross multiply
    10,662.60x = 15,965.10 × 8,358.60
  4. Step 4: Simplify right side
    10,662.60x = 133,445,884.86
  5. Step 5: Solve for x
    x = 133,445,884.86/10,662.60
  6. Step 6: Final answer
    x = 12,515.32

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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.