Home / 21,251.28-31,881.24-17,557.68

Finding the Fourth Proportional to 21,251.28, 31,881.24 and 17,557.68

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Solution

The fourth proportional to 21,251.28, 31,881.24 and 17,557.68 is: 26,340.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.28 : 31,881.24 = 17,557.68 : x
  2. Step 2: Convert to fraction form
    21,251.28/31,881.24 = 17,557.68/x
  3. Step 3: Cross multiply
    21,251.28x = 31,881.24 × 17,557.68
  4. Step 4: Simplify right side
    21,251.28x = 559,760,609.92
  5. Step 5: Solve for x
    x = 559,760,609.92/21,251.28
  6. Step 6: Final answer
    x = 26,340.09

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1.5x scale

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.