Home / 15,184.28-20,954.39-8,378.55

Finding the Fourth Proportional to 15,184.28, 20,954.39 and 8,378.55

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Solution

The fourth proportional to 15,184.28, 20,954.39 and 8,378.55 is: 11,562.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,184.28 : 20,954.39 = 8,378.55 : x
  2. Step 2: Convert to fraction form
    15,184.28/20,954.39 = 8,378.55/x
  3. Step 3: Cross multiply
    15,184.28x = 20,954.39 × 8,378.55
  4. Step 4: Simplify right side
    15,184.28x = 175,567,425.28
  5. Step 5: Solve for x
    x = 175,567,425.28/15,184.28
  6. Step 6: Final answer
    x = 11,562.44

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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.