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Finding the Fourth Proportional to 8,765.53, 12,103.14 and 5,785.60

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Solution

The fourth proportional to 8,765.53, 12,103.14 and 5,785.60 is: 7,988.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.53 : 12,103.14 = 5,785.60 : x
  2. Step 2: Convert to fraction form
    8,765.53/12,103.14 = 5,785.60/x
  3. Step 3: Cross multiply
    8,765.53x = 12,103.14 × 5,785.60
  4. Step 4: Simplify right side
    8,765.53x = 70,023,926.78
  5. Step 5: Solve for x
    x = 70,023,926.78/8,765.53
  6. Step 6: Final answer
    x = 7,988.56

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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.