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Finding the Fourth Proportional to 20,371.76, 30,561.24 and 7,231.76

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Solution

The fourth proportional to 20,371.76, 30,561.24 and 7,231.76 is: 10,848.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.76 : 30,561.24 = 7,231.76 : x
  2. Step 2: Convert to fraction form
    20,371.76/30,561.24 = 7,231.76/x
  3. Step 3: Cross multiply
    20,371.76x = 30,561.24 × 7,231.76
  4. Step 4: Simplify right side
    20,371.76x = 221,011,552.98
  5. Step 5: Solve for x
    x = 221,011,552.98/20,371.76
  6. Step 6: Final answer
    x = 10,848.92

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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.