Home / 12,911.13-17,816.32-7,245.10

Finding the Fourth Proportional to 12,911.13, 17,816.32 and 7,245.10

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Solution

The fourth proportional to 12,911.13, 17,816.32 and 7,245.10 is: 9,997.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.13 : 17,816.32 = 7,245.10 : x
  2. Step 2: Convert to fraction form
    12,911.13/17,816.32 = 7,245.10/x
  3. Step 3: Cross multiply
    12,911.13x = 17,816.32 × 7,245.10
  4. Step 4: Simplify right side
    12,911.13x = 129,081,020.03
  5. Step 5: Solve for x
    x = 129,081,020.03/12,911.13
  6. Step 6: Final answer
    x = 9,997.65

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Similar ratio
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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.