Home / 12,631.20-18,960-5,240.04

Finding the Fourth Proportional to 12,631.20, 18,960 and 5,240.04

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Solution

The fourth proportional to 12,631.20, 18,960 and 5,240.04 is: 7,865.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.20 : 18,960 = 5,240.04 : x
  2. Step 2: Convert to fraction form
    12,631.20/18,960 = 5,240.04/x
  3. Step 3: Cross multiply
    12,631.20x = 18,960 × 5,240.04
  4. Step 4: Simplify right side
    12,631.20x = 99,351,205.80
  5. Step 5: Solve for x
    x = 99,351,205.80/12,631.20
  6. Step 6: Final answer
    x = 7,865.54

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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.