Home / 12,631.20-18,962.40-7,951.20

Finding the Fourth Proportional to 12,631.20, 18,962.40 and 7,951.20

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Solution

The fourth proportional to 12,631.20, 18,962.40 and 7,951.20 is: 11,936.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.20 : 18,962.40 = 7,951.20 : x
  2. Step 2: Convert to fraction form
    12,631.20/18,962.40 = 7,951.20/x
  3. Step 3: Cross multiply
    12,631.20x = 18,962.40 × 7,951.20
  4. Step 4: Simplify right side
    12,631.20x = 150,773,834.88
  5. Step 5: Solve for x
    x = 150,773,834.88/12,631.20
  6. Step 6: Final answer
    x = 11,936.62

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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.