Home / 8,722.40-13,085.62-2,878.78

Finding the Fourth Proportional to 8,722.40, 13,085.62 and 2,878.78

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Solution

The fourth proportional to 8,722.40, 13,085.62 and 2,878.78 is: 4,318.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.40 : 13,085.62 = 2,878.78 : x
  2. Step 2: Convert to fraction form
    8,722.40/13,085.62 = 2,878.78/x
  3. Step 3: Cross multiply
    8,722.40x = 13,085.62 × 2,878.78
  4. Step 4: Simplify right side
    8,722.40x = 37,670,621.14
  5. Step 5: Solve for x
    x = 37,670,621.14/8,722.40
  6. Step 6: Final answer
    x = 4,318.84

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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.