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Finding the Fourth Proportional to 18,689.24, 27,994.98 and 8,836.40

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Solution

The fourth proportional to 18,689.24, 27,994.98 and 8,836.40 is: 13,236.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.24 : 27,994.98 = 8,836.40 : x
  2. Step 2: Convert to fraction form
    18,689.24/27,994.98 = 8,836.40/x
  3. Step 3: Cross multiply
    18,689.24x = 27,994.98 × 8,836.40
  4. Step 4: Simplify right side
    18,689.24x = 247,374,841.27
  5. Step 5: Solve for x
    x = 247,374,841.27/18,689.24
  6. Step 6: Final answer
    x = 13,236.22

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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.