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Finding the Fourth Proportional to 8,722.68, 13,084.47 and 2,879.74

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Solution

The fourth proportional to 8,722.68, 13,084.47 and 2,879.74 is: 4,319.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.68 : 13,084.47 = 2,879.74 : x
  2. Step 2: Convert to fraction form
    8,722.68/13,084.47 = 2,879.74/x
  3. Step 3: Cross multiply
    8,722.68x = 13,084.47 × 2,879.74
  4. Step 4: Simplify right side
    8,722.68x = 37,679,871.64
  5. Step 5: Solve for x
    x = 37,679,871.64/8,722.68
  6. Step 6: Final answer
    x = 4,319.76

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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.