Home / 21,209.02-31,764.30-20,470.93

Finding the Fourth Proportional to 21,209.02, 31,764.30 and 20,470.93

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Solution

The fourth proportional to 21,209.02, 31,764.30 and 20,470.93 is: 30,658.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.02 : 31,764.30 = 20,470.93 : x
  2. Step 2: Convert to fraction form
    21,209.02/31,764.30 = 20,470.93/x
  3. Step 3: Cross multiply
    21,209.02x = 31,764.30 × 20,470.93
  4. Step 4: Simplify right side
    21,209.02x = 650,244,761.80
  5. Step 5: Solve for x
    x = 650,244,761.80/21,209.02
  6. Step 6: Final answer
    x = 30,658.88

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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.