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Finding the Fourth Proportional to 13,248.52, 19,920.13 and 12,221.24

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Solution

The fourth proportional to 13,248.52, 19,920.13 and 12,221.24 is: 18,375.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,248.52 : 19,920.13 = 12,221.24 : x
  2. Step 2: Convert to fraction form
    13,248.52/19,920.13 = 12,221.24/x
  3. Step 3: Cross multiply
    13,248.52x = 19,920.13 × 12,221.24
  4. Step 4: Simplify right side
    13,248.52x = 243,448,670.31
  5. Step 5: Solve for x
    x = 243,448,670.31/13,248.52
  6. Step 6: Final answer
    x = 18,375.54

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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.