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Finding the Fourth Proportional to 12,635.64, 17,434.76 and 7,917.21

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Solution

The fourth proportional to 12,635.64, 17,434.76 and 7,917.21 is: 10,924.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,635.64 : 17,434.76 = 7,917.21 : x
  2. Step 2: Convert to fraction form
    12,635.64/17,434.76 = 7,917.21/x
  3. Step 3: Cross multiply
    12,635.64x = 17,434.76 × 7,917.21
  4. Step 4: Simplify right side
    12,635.64x = 138,034,616.63
  5. Step 5: Solve for x
    x = 138,034,616.63/12,635.64
  6. Step 6: Final answer
    x = 10,924.23

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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.