Home / 12,512.18-18,769.68-4,192.79

Finding the Fourth Proportional to 12,512.18, 18,769.68 and 4,192.79

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Solution

The fourth proportional to 12,512.18, 18,769.68 and 4,192.79 is: 6,289.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,512.18 : 18,769.68 = 4,192.79 : x
  2. Step 2: Convert to fraction form
    12,512.18/18,769.68 = 4,192.79/x
  3. Step 3: Cross multiply
    12,512.18x = 18,769.68 × 4,192.79
  4. Step 4: Simplify right side
    12,512.18x = 78,697,232.76
  5. Step 5: Solve for x
    x = 78,697,232.76/12,512.18
  6. Step 6: Final answer
    x = 6,289.65

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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.