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Finding the Fourth Proportional to 18,974.28, 28,449.24 and 7,888.68

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Solution

The fourth proportional to 18,974.28, 28,449.24 and 7,888.68 is: 11,827.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.28 : 28,449.24 = 7,888.68 : x
  2. Step 2: Convert to fraction form
    18,974.28/28,449.24 = 7,888.68/x
  3. Step 3: Cross multiply
    18,974.28x = 28,449.24 × 7,888.68
  4. Step 4: Simplify right side
    18,974.28x = 224,426,950.60
  5. Step 5: Solve for x
    x = 224,426,950.60/18,974.28
  6. Step 6: Final answer
    x = 11,827.96

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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.