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Finding the Fourth Proportional to 12,308.74, 18,444.20 and 8,354.86

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Solution

The fourth proportional to 12,308.74, 18,444.20 and 8,354.86 is: 12,519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,308.74 : 18,444.20 = 8,354.86 : x
  2. Step 2: Convert to fraction form
    12,308.74/18,444.20 = 8,354.86/x
  3. Step 3: Cross multiply
    12,308.74x = 18,444.20 × 8,354.86
  4. Step 4: Simplify right side
    12,308.74x = 154,098,708.81
  5. Step 5: Solve for x
    x = 154,098,708.81/12,308.74
  6. Step 6: Final answer
    x = 12,519.45

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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.