Home / 27,989.62-38,660.36-20,320.66

Finding the Fourth Proportional to 27,989.62, 38,660.36 and 20,320.66

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Solution

The fourth proportional to 27,989.62, 38,660.36 and 20,320.66 is: 28,067.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,989.62 : 38,660.36 = 20,320.66 : x
  2. Step 2: Convert to fraction form
    27,989.62/38,660.36 = 20,320.66/x
  3. Step 3: Cross multiply
    27,989.62x = 38,660.36 × 20,320.66
  4. Step 4: Simplify right side
    27,989.62x = 785,604,031.04
  5. Step 5: Solve for x
    x = 785,604,031.04/27,989.62
  6. Step 6: Final answer
    x = 28,067.69

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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.