Home / 20,510.75-28,304.85-11,079.31

Finding the Fourth Proportional to 20,510.75, 28,304.85 and 11,079.31

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Solution

The fourth proportional to 20,510.75, 28,304.85 and 11,079.31 is: 15,289.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.75 : 28,304.85 = 11,079.31 : x
  2. Step 2: Convert to fraction form
    20,510.75/28,304.85 = 11,079.31/x
  3. Step 3: Cross multiply
    20,510.75x = 28,304.85 × 11,079.31
  4. Step 4: Simplify right side
    20,510.75x = 313,598,278.42
  5. Step 5: Solve for x
    x = 313,598,278.42/20,510.75
  6. Step 6: Final answer
    x = 15,289.46

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Half scale
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Double scale
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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.