Home / 12,728.74-17,561.19-7,422.43

Finding the Fourth Proportional to 12,728.74, 17,561.19 and 7,422.43

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Solution

The fourth proportional to 12,728.74, 17,561.19 and 7,422.43 is: 10,240.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.74 : 17,561.19 = 7,422.43 : x
  2. Step 2: Convert to fraction form
    12,728.74/17,561.19 = 7,422.43/x
  3. Step 3: Cross multiply
    12,728.74x = 17,561.19 × 7,422.43
  4. Step 4: Simplify right side
    12,728.74x = 130,346,703.49
  5. Step 5: Solve for x
    x = 130,346,703.49/12,728.74
  6. Step 6: Final answer
    x = 10,240.35

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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.