Home / 21,291.76-31,938-7,060.30

Finding the Fourth Proportional to 21,291.76, 31,938 and 7,060.30

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Solution

The fourth proportional to 21,291.76, 31,938 and 7,060.30 is: 10,590.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.76 : 31,938 = 7,060.30 : x
  2. Step 2: Convert to fraction form
    21,291.76/31,938 = 7,060.30/x
  3. Step 3: Cross multiply
    21,291.76x = 31,938 × 7,060.30
  4. Step 4: Simplify right side
    21,291.76x = 225,491,861.40
  5. Step 5: Solve for x
    x = 225,491,861.40/21,291.76
  6. Step 6: Final answer
    x = 10,590.57

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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.