Home / 20,215.72-27,865.38-13,488.04

Finding the Fourth Proportional to 20,215.72, 27,865.38 and 13,488.04

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Solution

The fourth proportional to 20,215.72, 27,865.38 and 13,488.04 is: 18,591.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.72 : 27,865.38 = 13,488.04 : x
  2. Step 2: Convert to fraction form
    20,215.72/27,865.38 = 13,488.04/x
  3. Step 3: Cross multiply
    20,215.72x = 27,865.38 × 13,488.04
  4. Step 4: Simplify right side
    20,215.72x = 375,849,360.06
  5. Step 5: Solve for x
    x = 375,849,360.06/20,215.72
  6. Step 6: Final answer
    x = 18,591.94

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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.