Home / 27,686.88-38,209.20-15,111.68

Finding the Fourth Proportional to 27,686.88, 38,209.20 and 15,111.68

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Solution

The fourth proportional to 27,686.88, 38,209.20 and 15,111.68 is: 20,854.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,686.88 : 38,209.20 = 15,111.68 : x
  2. Step 2: Convert to fraction form
    27,686.88/38,209.20 = 15,111.68/x
  3. Step 3: Cross multiply
    27,686.88x = 38,209.20 × 15,111.68
  4. Step 4: Simplify right side
    27,686.88x = 577,405,203.46
  5. Step 5: Solve for x
    x = 577,405,203.46/27,686.88
  6. Step 6: Final answer
    x = 20,854.83

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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.