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Finding the Fourth Proportional to 14,320.80, 21,481.20 and 10,432.80

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Solution

The fourth proportional to 14,320.80, 21,481.20 and 10,432.80 is: 15,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,320.80 : 21,481.20 = 10,432.80 : x
  2. Step 2: Convert to fraction form
    14,320.80/21,481.20 = 10,432.80/x
  3. Step 3: Cross multiply
    14,320.80x = 21,481.20 × 10,432.80
  4. Step 4: Simplify right side
    14,320.80x = 224,109,063.36
  5. Step 5: Solve for x
    x = 224,109,063.36/14,320.80
  6. Step 6: Final answer
    x = 15,649.20

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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.