Home / 20,690.13-31,044.30-6,839.13

Finding the Fourth Proportional to 20,690.13, 31,044.30 and 6,839.13

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Solution

The fourth proportional to 20,690.13, 31,044.30 and 6,839.13 is: 10,261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.13 : 31,044.30 = 6,839.13 : x
  2. Step 2: Convert to fraction form
    20,690.13/31,044.30 = 6,839.13/x
  3. Step 3: Cross multiply
    20,690.13x = 31,044.30 × 6,839.13
  4. Step 4: Simplify right side
    20,690.13x = 212,316,003.46
  5. Step 5: Solve for x
    x = 212,316,003.46/20,690.13
  6. Step 6: Final answer
    x = 10,261.70

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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.