Home / 12,711.12-17,540.64-7,045.68

Finding the Fourth Proportional to 12,711.12, 17,540.64 and 7,045.68

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Solution

The fourth proportional to 12,711.12, 17,540.64 and 7,045.68 is: 9,722.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.12 : 17,540.64 = 7,045.68 : x
  2. Step 2: Convert to fraction form
    12,711.12/17,540.64 = 7,045.68/x
  3. Step 3: Cross multiply
    12,711.12x = 17,540.64 × 7,045.68
  4. Step 4: Simplify right side
    12,711.12x = 123,585,736.44
  5. Step 5: Solve for x
    x = 123,585,736.44/12,711.12
  6. Step 6: Final answer
    x = 9,722.65

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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.