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Finding the Fourth Proportional to 8,387.57, 12,586.57 and 4,879.24

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Solution

The fourth proportional to 8,387.57, 12,586.57 and 4,879.24 is: 7,321.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.57 : 12,586.57 = 4,879.24 : x
  2. Step 2: Convert to fraction form
    8,387.57/12,586.57 = 4,879.24/x
  3. Step 3: Cross multiply
    8,387.57x = 12,586.57 × 4,879.24
  4. Step 4: Simplify right side
    8,387.57x = 61,412,852.14
  5. Step 5: Solve for x
    x = 61,412,852.14/8,387.57
  6. Step 6: Final answer
    x = 7,321.89

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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.