Home / 11,439.20-17,187.60-7,281.20

Finding the Fourth Proportional to 11,439.20, 17,187.60 and 7,281.20

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Solution

The fourth proportional to 11,439.20, 17,187.60 and 7,281.20 is: 10,940.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.20 : 17,187.60 = 7,281.20 : x
  2. Step 2: Convert to fraction form
    11,439.20/17,187.60 = 7,281.20/x
  3. Step 3: Cross multiply
    11,439.20x = 17,187.60 × 7,281.20
  4. Step 4: Simplify right side
    11,439.20x = 125,146,353.12
  5. Step 5: Solve for x
    x = 125,146,353.12/11,439.20
  6. Step 6: Final answer
    x = 10,940.13

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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.