Home / 20,974.71-28,945.08-11,543.88

Finding the Fourth Proportional to 20,974.71, 28,945.08 and 11,543.88

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Solution

The fourth proportional to 20,974.71, 28,945.08 and 11,543.88 is: 15,930.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.71 : 28,945.08 = 11,543.88 : x
  2. Step 2: Convert to fraction form
    20,974.71/28,945.08 = 11,543.88/x
  3. Step 3: Cross multiply
    20,974.71x = 28,945.08 × 11,543.88
  4. Step 4: Simplify right side
    20,974.71x = 334,138,530.11
  5. Step 5: Solve for x
    x = 334,138,530.11/20,974.71
  6. Step 6: Final answer
    x = 15,930.54

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1.5x scale

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.