Home / 20,990.64-31,493.24-9,312.04

Finding the Fourth Proportional to 20,990.64, 31,493.24 and 9,312.04

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Solution

The fourth proportional to 20,990.64, 31,493.24 and 9,312.04 is: 13,971.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.64 : 31,493.24 = 9,312.04 : x
  2. Step 2: Convert to fraction form
    20,990.64/31,493.24 = 9,312.04/x
  3. Step 3: Cross multiply
    20,990.64x = 31,493.24 × 9,312.04
  4. Step 4: Simplify right side
    20,990.64x = 293,266,310.61
  5. Step 5: Solve for x
    x = 293,266,310.61/20,990.64
  6. Step 6: Final answer
    x = 13,971.29

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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.