Home / 21,105.68-31,597.76-13,997.92

Finding the Fourth Proportional to 21,105.68, 31,597.76 and 13,997.92

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Solution

The fourth proportional to 21,105.68, 31,597.76 and 13,997.92 is: 20,956.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.68 : 31,597.76 = 13,997.92 : x
  2. Step 2: Convert to fraction form
    21,105.68/31,597.76 = 13,997.92/x
  3. Step 3: Cross multiply
    21,105.68x = 31,597.76 × 13,997.92
  4. Step 4: Simplify right side
    21,105.68x = 442,302,916.66
  5. Step 5: Solve for x
    x = 442,302,916.66/21,105.68
  6. Step 6: Final answer
    x = 20,956.58

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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.