Home / 27,785.12-38,343.20-15,209.84

Finding the Fourth Proportional to 27,785.12, 38,343.20 and 15,209.84

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Solution

The fourth proportional to 27,785.12, 38,343.20 and 15,209.84 is: 20,989.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,785.12 : 38,343.20 = 15,209.84 : x
  2. Step 2: Convert to fraction form
    27,785.12/38,343.20 = 15,209.84/x
  3. Step 3: Cross multiply
    27,785.12x = 38,343.20 × 15,209.84
  4. Step 4: Simplify right side
    27,785.12x = 583,193,937.09
  5. Step 5: Solve for x
    x = 583,193,937.09/27,785.12
  6. Step 6: Final answer
    x = 20,989.43

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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.