Home / 10,869.20-16,297.20-4,287.80

Finding the Fourth Proportional to 10,869.20, 16,297.20 and 4,287.80

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Solution

The fourth proportional to 10,869.20, 16,297.20 and 4,287.80 is: 6,429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,869.20 : 16,297.20 = 4,287.80 : x
  2. Step 2: Convert to fraction form
    10,869.20/16,297.20 = 4,287.80/x
  3. Step 3: Cross multiply
    10,869.20x = 16,297.20 × 4,287.80
  4. Step 4: Simplify right side
    10,869.20x = 69,879,134.16
  5. Step 5: Solve for x
    x = 69,879,134.16/10,869.20
  6. Step 6: Final answer
    x = 6,429.10

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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.