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Finding the Fourth Proportional to 21,708.80, 32,491.20 and 15,768.80

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Solution

The fourth proportional to 21,708.80, 32,491.20 and 15,768.80 is: 23,600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708.80 : 32,491.20 = 15,768.80 : x
  2. Step 2: Convert to fraction form
    21,708.80/32,491.20 = 15,768.80/x
  3. Step 3: Cross multiply
    21,708.80x = 32,491.20 × 15,768.80
  4. Step 4: Simplify right side
    21,708.80x = 512,347,234.56
  5. Step 5: Solve for x
    x = 512,347,234.56/21,708.80
  6. Step 6: Final answer
    x = 23,600.90

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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.