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Finding the Fourth Proportional to 11,407.68, 17,111 and 8,080.64

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Solution

The fourth proportional to 11,407.68, 17,111 and 8,080.64 is: 12,120.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,407.68 : 17,111 = 8,080.64 : x
  2. Step 2: Convert to fraction form
    11,407.68/17,111 = 8,080.64/x
  3. Step 3: Cross multiply
    11,407.68x = 17,111 × 8,080.64
  4. Step 4: Simplify right side
    11,407.68x = 138,267,831.04
  5. Step 5: Solve for x
    x = 138,267,831.04/11,407.68
  6. Step 6: Final answer
    x = 12,120.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.