Home / 21,311.91-31,921.43-17,572.14

Finding the Fourth Proportional to 21,311.91, 31,921.43 and 17,572.14

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Solution

The fourth proportional to 21,311.91, 31,921.43 and 17,572.14 is: 26,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.91 : 31,921.43 = 17,572.14 : x
  2. Step 2: Convert to fraction form
    21,311.91/31,921.43 = 17,572.14/x
  3. Step 3: Cross multiply
    21,311.91x = 31,921.43 × 17,572.14
  4. Step 4: Simplify right side
    21,311.91x = 560,927,749.10
  5. Step 5: Solve for x
    x = 560,927,749.10/21,311.91
  6. Step 6: Final answer
    x = 26,319.92

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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.