Home / 8,781.16-12,097.38-7,218.28

Finding the Fourth Proportional to 8,781.16, 12,097.38 and 7,218.28

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Solution

The fourth proportional to 8,781.16, 12,097.38 and 7,218.28 is: 9,944.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.16 : 12,097.38 = 7,218.28 : x
  2. Step 2: Convert to fraction form
    8,781.16/12,097.38 = 7,218.28/x
  3. Step 3: Cross multiply
    8,781.16x = 12,097.38 × 7,218.28
  4. Step 4: Simplify right side
    8,781.16x = 87,322,276.11
  5. Step 5: Solve for x
    x = 87,322,276.11/8,781.16
  6. Step 6: Final answer
    x = 9,944.28

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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.