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Finding the Fourth Proportional to 12,221.55, 18,328.65 and 6,374.97

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Solution

The fourth proportional to 12,221.55, 18,328.65 and 6,374.97 is: 9,560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.55 : 18,328.65 = 6,374.97 : x
  2. Step 2: Convert to fraction form
    12,221.55/18,328.65 = 6,374.97/x
  3. Step 3: Cross multiply
    12,221.55x = 18,328.65 × 6,374.97
  4. Step 4: Simplify right side
    12,221.55x = 116,844,502.25
  5. Step 5: Solve for x
    x = 116,844,502.25/12,221.55
  6. Step 6: Final answer
    x = 9,560.53

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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.