Home / 11,439.20-17,125.20-8,530.40

Finding the Fourth Proportional to 11,439.20, 17,125.20 and 8,530.40

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Solution

The fourth proportional to 11,439.20, 17,125.20 and 8,530.40 is: 12,770.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.20 : 17,125.20 = 8,530.40 : x
  2. Step 2: Convert to fraction form
    11,439.20/17,125.20 = 8,530.40/x
  3. Step 3: Cross multiply
    11,439.20x = 17,125.20 × 8,530.40
  4. Step 4: Simplify right side
    11,439.20x = 146,084,806.08
  5. Step 5: Solve for x
    x = 146,084,806.08/11,439.20
  6. Step 6: Final answer
    x = 12,770.54

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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.