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Finding the Fourth Proportional to 12,918.62, 17,832.19 and 7,613.10

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Solution

The fourth proportional to 12,918.62, 17,832.19 and 7,613.10 is: 10,508.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.62 : 17,832.19 = 7,613.10 : x
  2. Step 2: Convert to fraction form
    12,918.62/17,832.19 = 7,613.10/x
  3. Step 3: Cross multiply
    12,918.62x = 17,832.19 × 7,613.10
  4. Step 4: Simplify right side
    12,918.62x = 135,758,156.53
  5. Step 5: Solve for x
    x = 135,758,156.53/12,918.62
  6. Step 6: Final answer
    x = 10,508.72

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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.