Home / 12,439.16-18,658.78-8,531.72

Finding the Fourth Proportional to 12,439.16, 18,658.78 and 8,531.72

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Solution

The fourth proportional to 12,439.16, 18,658.78 and 8,531.72 is: 12,797.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.16 : 18,658.78 = 8,531.72 : x
  2. Step 2: Convert to fraction form
    12,439.16/18,658.78 = 8,531.72/x
  3. Step 3: Cross multiply
    12,439.16x = 18,658.78 × 8,531.72
  4. Step 4: Simplify right side
    12,439.16x = 159,191,486.50
  5. Step 5: Solve for x
    x = 159,191,486.50/12,439.16
  6. Step 6: Final answer
    x = 12,797.61

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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.