Home / 12,122.32-18,148.76-8,219.76

Finding the Fourth Proportional to 12,122.32, 18,148.76 and 8,219.76

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Solution

The fourth proportional to 12,122.32, 18,148.76 and 8,219.76 is: 12,306.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.32 : 18,148.76 = 8,219.76 : x
  2. Step 2: Convert to fraction form
    12,122.32/18,148.76 = 8,219.76/x
  3. Step 3: Cross multiply
    12,122.32x = 18,148.76 × 8,219.76
  4. Step 4: Simplify right side
    12,122.32x = 149,178,451.50
  5. Step 5: Solve for x
    x = 149,178,451.50/12,122.32
  6. Step 6: Final answer
    x = 12,306.10

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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.