Home / 12,561.28-17,330.16-7,843.84

Finding the Fourth Proportional to 12,561.28, 17,330.16 and 7,843.84

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Solution

The fourth proportional to 12,561.28, 17,330.16 and 7,843.84 is: 10,821.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.28 : 17,330.16 = 7,843.84 : x
  2. Step 2: Convert to fraction form
    12,561.28/17,330.16 = 7,843.84/x
  3. Step 3: Cross multiply
    12,561.28x = 17,330.16 × 7,843.84
  4. Step 4: Simplify right side
    12,561.28x = 135,935,002.21
  5. Step 5: Solve for x
    x = 135,935,002.21/12,561.28
  6. Step 6: Final answer
    x = 10,821.75

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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.