Home / 21,126.42-31,691.36-7,086.58

Finding the Fourth Proportional to 21,126.42, 31,691.36 and 7,086.58

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Solution

The fourth proportional to 21,126.42, 31,691.36 and 7,086.58 is: 10,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.42 : 31,691.36 = 7,086.58 : x
  2. Step 2: Convert to fraction form
    21,126.42/31,691.36 = 7,086.58/x
  3. Step 3: Cross multiply
    21,126.42x = 31,691.36 × 7,086.58
  4. Step 4: Simplify right side
    21,126.42x = 224,583,296.44
  5. Step 5: Solve for x
    x = 224,583,296.44/21,126.42
  6. Step 6: Final answer
    x = 10,630.45

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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.