Home / 20,712.26-31,068.40-12,394.70

Finding the Fourth Proportional to 20,712.26, 31,068.40 and 12,394.70

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Solution

The fourth proportional to 20,712.26, 31,068.40 and 12,394.70 is: 18,592.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.26 : 31,068.40 = 12,394.70 : x
  2. Step 2: Convert to fraction form
    20,712.26/31,068.40 = 12,394.70/x
  3. Step 3: Cross multiply
    20,712.26x = 31,068.40 × 12,394.70
  4. Step 4: Simplify right side
    20,712.26x = 385,083,497.48
  5. Step 5: Solve for x
    x = 385,083,497.48/20,712.26
  6. Step 6: Final answer
    x = 18,592.06

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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.