Home / 27,720.18-38,253.97-15,145.20

Finding the Fourth Proportional to 27,720.18, 38,253.97 and 15,145.20

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Solution

The fourth proportional to 27,720.18, 38,253.97 and 15,145.20 is: 20,900.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.18 : 38,253.97 = 15,145.20 : x
  2. Step 2: Convert to fraction form
    27,720.18/38,253.97 = 15,145.20/x
  3. Step 3: Cross multiply
    27,720.18x = 38,253.97 × 15,145.20
  4. Step 4: Simplify right side
    27,720.18x = 579,363,950.72
  5. Step 5: Solve for x
    x = 579,363,950.72/27,720.18
  6. Step 6: Final answer
    x = 20,900.44

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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.