Home / 18,643.38-25,728.97-10,686.12

Finding the Fourth Proportional to 18,643.38, 25,728.97 and 10,686.12

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Solution

The fourth proportional to 18,643.38, 25,728.97 and 10,686.12 is: 14,747.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.38 : 25,728.97 = 10,686.12 : x
  2. Step 2: Convert to fraction form
    18,643.38/25,728.97 = 10,686.12/x
  3. Step 3: Cross multiply
    18,643.38x = 25,728.97 × 10,686.12
  4. Step 4: Simplify right side
    18,643.38x = 274,942,860.90
  5. Step 5: Solve for x
    x = 274,942,860.90/18,643.38
  6. Step 6: Final answer
    x = 14,747.48

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Half scale
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Double scale
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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.