Home / 20,974.28-28,945.08-11,543.42

Finding the Fourth Proportional to 20,974.28, 28,945.08 and 11,543.42

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Solution

The fourth proportional to 20,974.28, 28,945.08 and 11,543.42 is: 15,930.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.28 : 28,945.08 = 11,543.42 : x
  2. Step 2: Convert to fraction form
    20,974.28/28,945.08 = 11,543.42/x
  3. Step 3: Cross multiply
    20,974.28x = 28,945.08 × 11,543.42
  4. Step 4: Simplify right side
    20,974.28x = 334,125,215.37
  5. Step 5: Solve for x
    x = 334,125,215.37/20,974.28
  6. Step 6: Final answer
    x = 15,930.24

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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.