Home / 20,220.10-30,330.15-7,908.10

Finding the Fourth Proportional to 20,220.10, 30,330.15 and 7,908.10

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Solution

The fourth proportional to 20,220.10, 30,330.15 and 7,908.10 is: 11,862.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.10 : 30,330.15 = 7,908.10 : x
  2. Step 2: Convert to fraction form
    20,220.10/30,330.15 = 7,908.10/x
  3. Step 3: Cross multiply
    20,220.10x = 30,330.15 × 7,908.10
  4. Step 4: Simplify right side
    20,220.10x = 239,853,859.22
  5. Step 5: Solve for x
    x = 239,853,859.22/20,220.10
  6. Step 6: Final answer
    x = 11,862.15

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Half scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.