Home / 21,731.44-29,990.88-12,171.52

Finding the Fourth Proportional to 21,731.44, 29,990.88 and 12,171.52

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Solution

The fourth proportional to 21,731.44, 29,990.88 and 12,171.52 is: 16,797.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.44 : 29,990.88 = 12,171.52 : x
  2. Step 2: Convert to fraction form
    21,731.44/29,990.88 = 12,171.52/x
  3. Step 3: Cross multiply
    21,731.44x = 29,990.88 × 12,171.52
  4. Step 4: Simplify right side
    21,731.44x = 365,034,595.74
  5. Step 5: Solve for x
    x = 365,034,595.74/21,731.44
  6. Step 6: Final answer
    x = 16,797.53

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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.