Home / 20,680.60-31,034.10-7,531.80

Finding the Fourth Proportional to 20,680.60, 31,034.10 and 7,531.80

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Solution

The fourth proportional to 20,680.60, 31,034.10 and 7,531.80 is: 11,302.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.60 : 31,034.10 = 7,531.80 : x
  2. Step 2: Convert to fraction form
    20,680.60/31,034.10 = 7,531.80/x
  3. Step 3: Cross multiply
    20,680.60x = 31,034.10 × 7,531.80
  4. Step 4: Simplify right side
    20,680.60x = 233,742,634.38
  5. Step 5: Solve for x
    x = 233,742,634.38/20,680.60
  6. Step 6: Final answer
    x = 11,302.51

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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.