Home / 20,974.50-28,945.08-11,543.31

Finding the Fourth Proportional to 20,974.50, 28,945.08 and 11,543.31

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Solution

The fourth proportional to 20,974.50, 28,945.08 and 11,543.31 is: 15,929.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.50 : 28,945.08 = 11,543.31 : x
  2. Step 2: Convert to fraction form
    20,974.50/28,945.08 = 11,543.31/x
  3. Step 3: Cross multiply
    20,974.50x = 28,945.08 × 11,543.31
  4. Step 4: Simplify right side
    20,974.50x = 334,122,031.41
  5. Step 5: Solve for x
    x = 334,122,031.41/20,974.50
  6. Step 6: Final answer
    x = 15,929.92

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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.