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Finding the Fourth Proportional to 21,388.80, 32,042.40 and 11,524.80

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Solution

The fourth proportional to 21,388.80, 32,042.40 and 11,524.80 is: 17,265.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.80 : 32,042.40 = 11,524.80 : x
  2. Step 2: Convert to fraction form
    21,388.80/32,042.40 = 11,524.80/x
  3. Step 3: Cross multiply
    21,388.80x = 32,042.40 × 11,524.80
  4. Step 4: Simplify right side
    21,388.80x = 369,282,251.52
  5. Step 5: Solve for x
    x = 369,282,251.52/21,388.80
  6. Step 6: Final answer
    x = 17,265.22

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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.