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Finding the Fourth Proportional to 11,445.10, 15,799.65 and 8,613.58

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Solution

The fourth proportional to 11,445.10, 15,799.65 and 8,613.58 is: 11,890.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,445.10 : 15,799.65 = 8,613.58 : x
  2. Step 2: Convert to fraction form
    11,445.10/15,799.65 = 8,613.58/x
  3. Step 3: Cross multiply
    11,445.10x = 15,799.65 × 8,613.58
  4. Step 4: Simplify right side
    11,445.10x = 136,091,549.25
  5. Step 5: Solve for x
    x = 136,091,549.25/11,445.10
  6. Step 6: Final answer
    x = 11,890.81

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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.