Home / 27,691.76-41,538.36-21,129.68

Finding the Fourth Proportional to 27,691.76, 41,538.36 and 21,129.68

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Solution

The fourth proportional to 27,691.76, 41,538.36 and 21,129.68 is: 31,695.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,691.76 : 41,538.36 = 21,129.68 : x
  2. Step 2: Convert to fraction form
    27,691.76/41,538.36 = 21,129.68/x
  3. Step 3: Cross multiply
    27,691.76x = 41,538.36 × 21,129.68
  4. Step 4: Simplify right side
    27,691.76x = 877,692,254.52
  5. Step 5: Solve for x
    x = 877,692,254.52/27,691.76
  6. Step 6: Final answer
    x = 31,695.07

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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.