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Finding the Fourth Proportional to 9,351.60, 12,909.88 and 5,815.95

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Solution

The fourth proportional to 9,351.60, 12,909.88 and 5,815.95 is: 8,028.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,351.60 : 12,909.88 = 5,815.95 : x
  2. Step 2: Convert to fraction form
    9,351.60/12,909.88 = 5,815.95/x
  3. Step 3: Cross multiply
    9,351.60x = 12,909.88 × 5,815.95
  4. Step 4: Simplify right side
    9,351.60x = 75,083,216.59
  5. Step 5: Solve for x
    x = 75,083,216.59/9,351.60
  6. Step 6: Final answer
    x = 8,028.92

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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.