Home / 20,384.12-28,131.72-11,432.44

Finding the Fourth Proportional to 20,384.12, 28,131.72 and 11,432.44

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Solution

The fourth proportional to 20,384.12, 28,131.72 and 11,432.44 is: 15,777.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.12 : 28,131.72 = 11,432.44 : x
  2. Step 2: Convert to fraction form
    20,384.12/28,131.72 = 11,432.44/x
  3. Step 3: Cross multiply
    20,384.12x = 28,131.72 × 11,432.44
  4. Step 4: Simplify right side
    20,384.12x = 321,614,201.00
  5. Step 5: Solve for x
    x = 321,614,201.00/20,384.12
  6. Step 6: Final answer
    x = 15,777.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.