Home / 27,920.40-38,530.11-15,983.70

Finding the Fourth Proportional to 27,920.40, 38,530.11 and 15,983.70

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Solution

The fourth proportional to 27,920.40, 38,530.11 and 15,983.70 is: 22,057.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,920.40 : 38,530.11 = 15,983.70 : x
  2. Step 2: Convert to fraction form
    27,920.40/38,530.11 = 15,983.70/x
  3. Step 3: Cross multiply
    27,920.40x = 38,530.11 × 15,983.70
  4. Step 4: Simplify right side
    27,920.40x = 615,853,719.21
  5. Step 5: Solve for x
    x = 615,853,719.21/27,920.40
  6. Step 6: Final answer
    x = 22,057.48

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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.