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Finding the Fourth Proportional to 18,689.68, 28,043.04 and 7,003.84

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Solution

The fourth proportional to 18,689.68, 28,043.04 and 7,003.84 is: 10,508.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.68 : 28,043.04 = 7,003.84 : x
  2. Step 2: Convert to fraction form
    18,689.68/28,043.04 = 7,003.84/x
  3. Step 3: Cross multiply
    18,689.68x = 28,043.04 × 7,003.84
  4. Step 4: Simplify right side
    18,689.68x = 196,408,965.27
  5. Step 5: Solve for x
    x = 196,408,965.27/18,689.68
  6. Step 6: Final answer
    x = 10,508.95

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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.