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Finding the Fourth Proportional to 18,861.65, 28,295.41 and 5,710.89

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Solution

The fourth proportional to 18,861.65, 28,295.41 and 5,710.89 is: 8,567.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.65 : 28,295.41 = 5,710.89 : x
  2. Step 2: Convert to fraction form
    18,861.65/28,295.41 = 5,710.89/x
  3. Step 3: Cross multiply
    18,861.65x = 28,295.41 × 5,710.89
  4. Step 4: Simplify right side
    18,861.65x = 161,591,974.01
  5. Step 5: Solve for x
    x = 161,591,974.01/18,861.65
  6. Step 6: Final answer
    x = 8,567.22

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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.