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Finding the Fourth Proportional to 18,794.40, 28,205.28 and 15,140.76

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Solution

The fourth proportional to 18,794.40, 28,205.28 and 15,140.76 is: 22,722.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794.40 : 28,205.28 = 15,140.76 : x
  2. Step 2: Convert to fraction form
    18,794.40/28,205.28 = 15,140.76/x
  3. Step 3: Cross multiply
    18,794.40x = 28,205.28 × 15,140.76
  4. Step 4: Simplify right side
    18,794.40x = 427,049,375.21
  5. Step 5: Solve for x
    x = 427,049,375.21/18,794.40
  6. Step 6: Final answer
    x = 22,722.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.