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Finding the Fourth Proportional to 8,699.20, 12,000.99 and 5,865.65

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Solution

The fourth proportional to 8,699.20, 12,000.99 and 5,865.65 is: 8,091.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.20 : 12,000.99 = 5,865.65 : x
  2. Step 2: Convert to fraction form
    8,699.20/12,000.99 = 5,865.65/x
  3. Step 3: Cross multiply
    8,699.20x = 12,000.99 × 5,865.65
  4. Step 4: Simplify right side
    8,699.20x = 70,393,613.99
  5. Step 5: Solve for x
    x = 70,393,613.99/8,699.20
  6. Step 6: Final answer
    x = 8,091.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.