Home / 47,856.40-71,811-19,769.92

Finding the Fourth Proportional to 47,856.40, 71,811 and 19,769.92

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Solution

The fourth proportional to 47,856.40, 71,811 and 19,769.92 is: 29,665.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,856.40 : 71,811 = 19,769.92 : x
  2. Step 2: Convert to fraction form
    47,856.40/71,811 = 19,769.92/x
  3. Step 3: Cross multiply
    47,856.40x = 71,811 × 19,769.92
  4. Step 4: Simplify right side
    47,856.40x = 1,419,697,545.59
  5. Step 5: Solve for x
    x = 1,419,697,545.59/47,856.40
  6. Step 6: Final answer
    x = 29,665.78

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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.