Home / 20,760.50-28,663.28-15,972.00

Finding the Fourth Proportional to 20,760.50, 28,663.28 and 15,972.00

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Solution

The fourth proportional to 20,760.50, 28,663.28 and 15,972.00 is: 22,051.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.50 : 28,663.28 = 15,972.00 : x
  2. Step 2: Convert to fraction form
    20,760.50/28,663.28 = 15,972.00/x
  3. Step 3: Cross multiply
    20,760.50x = 28,663.28 × 15,972.00
  4. Step 4: Simplify right side
    20,760.50x = 457,810,031.78
  5. Step 5: Solve for x
    x = 457,810,031.78/20,760.50
  6. Step 6: Final answer
    x = 22,051.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.