Home / 27,680.78-38,199.12-15,104.72

Finding the Fourth Proportional to 27,680.78, 38,199.12 and 15,104.72

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Solution

The fourth proportional to 27,680.78, 38,199.12 and 15,104.72 is: 20,844.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,680.78 : 38,199.12 = 15,104.72 : x
  2. Step 2: Convert to fraction form
    27,680.78/38,199.12 = 15,104.72/x
  3. Step 3: Cross multiply
    27,680.78x = 38,199.12 × 15,104.72
  4. Step 4: Simplify right side
    27,680.78x = 576,987,011.85
  5. Step 5: Solve for x
    x = 576,987,011.85/27,680.78
  6. Step 6: Final answer
    x = 20,844.32

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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.