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Finding the Fourth Proportional to 18,885.60, 28,329.62 and 5,747.00

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Solution

The fourth proportional to 18,885.60, 28,329.62 and 5,747.00 is: 8,620.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.60 : 28,329.62 = 5,747.00 : x
  2. Step 2: Convert to fraction form
    18,885.60/28,329.62 = 5,747.00/x
  3. Step 3: Cross multiply
    18,885.60x = 28,329.62 × 5,747.00
  4. Step 4: Simplify right side
    18,885.60x = 162,810,155.76
  5. Step 5: Solve for x
    x = 162,810,155.76/18,885.60
  6. Step 6: Final answer
    x = 8,620.86

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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.