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Finding the Fourth Proportional to 12,613.60, 17,409.76 and 7,311.32

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Solution

The fourth proportional to 12,613.60, 17,409.76 and 7,311.32 is: 10,091.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.60 : 17,409.76 = 7,311.32 : x
  2. Step 2: Convert to fraction form
    12,613.60/17,409.76 = 7,311.32/x
  3. Step 3: Cross multiply
    12,613.60x = 17,409.76 × 7,311.32
  4. Step 4: Simplify right side
    12,613.60x = 127,288,326.48
  5. Step 5: Solve for x
    x = 127,288,326.48/12,613.60
  6. Step 6: Final answer
    x = 10,091.36

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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.