Home / 27,789.40-38,346.92-15,689.20

Finding the Fourth Proportional to 27,789.40, 38,346.92 and 15,689.20

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Solution

The fourth proportional to 27,789.40, 38,346.92 and 15,689.20 is: 21,649.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,789.40 : 38,346.92 = 15,689.20 : x
  2. Step 2: Convert to fraction form
    27,789.40/38,346.92 = 15,689.20/x
  3. Step 3: Cross multiply
    27,789.40x = 38,346.92 × 15,689.20
  4. Step 4: Simplify right side
    27,789.40x = 601,632,497.26
  5. Step 5: Solve for x
    x = 601,632,497.26/27,789.40
  6. Step 6: Final answer
    x = 21,649.71

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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.