Home / 12,728.28-17,574.13-8,489.35

Finding the Fourth Proportional to 12,728.28, 17,574.13 and 8,489.35

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Solution

The fourth proportional to 12,728.28, 17,574.13 and 8,489.35 is: 11,721.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.28 : 17,574.13 = 8,489.35 : x
  2. Step 2: Convert to fraction form
    12,728.28/17,574.13 = 8,489.35/x
  3. Step 3: Cross multiply
    12,728.28x = 17,574.13 × 8,489.35
  4. Step 4: Simplify right side
    12,728.28x = 149,192,940.52
  5. Step 5: Solve for x
    x = 149,192,940.52/12,728.28
  6. Step 6: Final answer
    x = 11,721.37

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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.