Home / 8,130.30-12,195.45-7,190.70

Finding the Fourth Proportional to 8,130.30, 12,195.45 and 7,190.70

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Solution

The fourth proportional to 8,130.30, 12,195.45 and 7,190.70 is: 10,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.30 : 12,195.45 = 7,190.70 : x
  2. Step 2: Convert to fraction form
    8,130.30/12,195.45 = 7,190.70/x
  3. Step 3: Cross multiply
    8,130.30x = 12,195.45 × 7,190.70
  4. Step 4: Simplify right side
    8,130.30x = 87,693,822.32
  5. Step 5: Solve for x
    x = 87,693,822.32/8,130.30
  6. Step 6: Final answer
    x = 10,786.05

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Double 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.