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Finding the Fourth Proportional to 8,613.71, 11,888.77 and 5,255.80

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Solution

The fourth proportional to 8,613.71, 11,888.77 and 5,255.80 is: 7,254.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.71 : 11,888.77 = 5,255.80 : x
  2. Step 2: Convert to fraction form
    8,613.71/11,888.77 = 5,255.80/x
  3. Step 3: Cross multiply
    8,613.71x = 11,888.77 × 5,255.80
  4. Step 4: Simplify right side
    8,613.71x = 62,484,984.23
  5. Step 5: Solve for x
    x = 62,484,984.23/8,613.71
  6. Step 6: Final answer
    x = 7,254.13

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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.