Home / 27,687.45-38,208.71-15,112.20

Finding the Fourth Proportional to 27,687.45, 38,208.71 and 15,112.20

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Solution

The fourth proportional to 27,687.45, 38,208.71 and 15,112.20 is: 20,854.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,687.45 : 38,208.71 = 15,112.20 : x
  2. Step 2: Convert to fraction form
    27,687.45/38,208.71 = 15,112.20/x
  3. Step 3: Cross multiply
    27,687.45x = 38,208.71 × 15,112.20
  4. Step 4: Simplify right side
    27,687.45x = 577,417,667.26
  5. Step 5: Solve for x
    x = 577,417,667.26/27,687.45
  6. Step 6: Final answer
    x = 20,854.85

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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.