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Finding the Fourth Proportional to 8,613.96, 11,889.12 and 5,256.05

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Solution

The fourth proportional to 8,613.96, 11,889.12 and 5,256.05 is: 7,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.96 : 11,889.12 = 5,256.05 : x
  2. Step 2: Convert to fraction form
    8,613.96/11,889.12 = 5,256.05/x
  3. Step 3: Cross multiply
    8,613.96x = 11,889.12 × 5,256.05
  4. Step 4: Simplify right side
    8,613.96x = 62,489,782.90
  5. Step 5: Solve for x
    x = 62,489,782.90/8,613.96
  6. Step 6: Final answer
    x = 7,254.48

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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.