Home / 21,008.45-31,517.35-9,164.15

Finding the Fourth Proportional to 21,008.45, 31,517.35 and 9,164.15

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Solution

The fourth proportional to 21,008.45, 31,517.35 and 9,164.15 is: 13,748.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.45 : 31,517.35 = 9,164.15 : x
  2. Step 2: Convert to fraction form
    21,008.45/31,517.35 = 9,164.15/x
  3. Step 3: Cross multiply
    21,008.45x = 31,517.35 × 9,164.15
  4. Step 4: Simplify right side
    21,008.45x = 288,829,565.42
  5. Step 5: Solve for x
    x = 288,829,565.42/21,008.45
  6. Step 6: Final answer
    x = 13,748.26

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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.