Home / 20,976.88-31,472.04-10,439.92

Finding the Fourth Proportional to 20,976.88, 31,472.04 and 10,439.92

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Solution

The fourth proportional to 20,976.88, 31,472.04 and 10,439.92 is: 15,663.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.88 : 31,472.04 = 10,439.92 : x
  2. Step 2: Convert to fraction form
    20,976.88/31,472.04 = 10,439.92/x
  3. Step 3: Cross multiply
    20,976.88x = 31,472.04 × 10,439.92
  4. Step 4: Simplify right side
    20,976.88x = 328,565,579.84
  5. Step 5: Solve for x
    x = 328,565,579.84/20,976.88
  6. Step 6: Final answer
    x = 15,663.22

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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.