Home / 19,871.20-27,422.08-10,918.80

Finding the Fourth Proportional to 19,871.20, 27,422.08 and 10,918.80

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Solution

The fourth proportional to 19,871.20, 27,422.08 and 10,918.80 is: 15,067.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.20 : 27,422.08 = 10,918.80 : x
  2. Step 2: Convert to fraction form
    19,871.20/27,422.08 = 10,918.80/x
  3. Step 3: Cross multiply
    19,871.20x = 27,422.08 × 10,918.80
  4. Step 4: Simplify right side
    19,871.20x = 299,416,207.10
  5. Step 5: Solve for x
    x = 299,416,207.10/19,871.20
  6. Step 6: Final answer
    x = 15,067.85

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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.