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Finding the Fourth Proportional to 12,158.76, 18,253.86 and 6,319.44

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Solution

The fourth proportional to 12,158.76, 18,253.86 and 6,319.44 is: 9,487.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,158.76 : 18,253.86 = 6,319.44 : x
  2. Step 2: Convert to fraction form
    12,158.76/18,253.86 = 6,319.44/x
  3. Step 3: Cross multiply
    12,158.76x = 18,253.86 × 6,319.44
  4. Step 4: Simplify right side
    12,158.76x = 115,354,173.04
  5. Step 5: Solve for x
    x = 115,354,173.04/12,158.76
  6. Step 6: Final answer
    x = 9,487.33

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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.