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Finding the Fourth Proportional to 8,390.98, 12,591.76 and 4,695.62

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Solution

The fourth proportional to 8,390.98, 12,591.76 and 4,695.62 is: 7,046.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.98 : 12,591.76 = 4,695.62 : x
  2. Step 2: Convert to fraction form
    8,390.98/12,591.76 = 4,695.62/x
  3. Step 3: Cross multiply
    8,390.98x = 12,591.76 × 4,695.62
  4. Step 4: Simplify right side
    8,390.98x = 59,126,120.09
  5. Step 5: Solve for x
    x = 59,126,120.09/8,390.98
  6. Step 6: Final answer
    x = 7,046.39

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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.