Home / 12,219.42-18,318.87-8,510.70

Finding the Fourth Proportional to 12,219.42, 18,318.87 and 8,510.70

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Solution

The fourth proportional to 12,219.42, 18,318.87 and 8,510.70 is: 12,758.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.42 : 18,318.87 = 8,510.70 : x
  2. Step 2: Convert to fraction form
    12,219.42/18,318.87 = 8,510.70/x
  3. Step 3: Cross multiply
    12,219.42x = 18,318.87 × 8,510.70
  4. Step 4: Simplify right side
    12,219.42x = 155,906,406.91
  5. Step 5: Solve for x
    x = 155,906,406.91/12,219.42
  6. Step 6: Final answer
    x = 12,758.90

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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.