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Finding the Fourth Proportional to 12,551.68, 18,822.70 and 4,229.45

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Solution

The fourth proportional to 12,551.68, 18,822.70 and 4,229.45 is: 6,342.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,551.68 : 18,822.70 = 4,229.45 : x
  2. Step 2: Convert to fraction form
    12,551.68/18,822.70 = 4,229.45/x
  3. Step 3: Cross multiply
    12,551.68x = 18,822.70 × 4,229.45
  4. Step 4: Simplify right side
    12,551.68x = 79,609,668.52
  5. Step 5: Solve for x
    x = 79,609,668.52/12,551.68
  6. Step 6: Final answer
    x = 6,342.55

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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.