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Finding the Fourth Proportional to 18,737.60, 28,106.40 and 4,886.60

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Solution

The fourth proportional to 18,737.60, 28,106.40 and 4,886.60 is: 7,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.60 : 28,106.40 = 4,886.60 : x
  2. Step 2: Convert to fraction form
    18,737.60/28,106.40 = 4,886.60/x
  3. Step 3: Cross multiply
    18,737.60x = 28,106.40 × 4,886.60
  4. Step 4: Simplify right side
    18,737.60x = 137,344,734.24
  5. Step 5: Solve for x
    x = 137,344,734.24/18,737.60
  6. Step 6: Final answer
    x = 7,329.90

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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.