Home / 12,778.80-19,168.28-4,458.78

Finding the Fourth Proportional to 12,778.80, 19,168.28 and 4,458.78

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Solution

The fourth proportional to 12,778.80, 19,168.28 and 4,458.78 is: 6,688.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,778.80 : 19,168.28 = 4,458.78 : x
  2. Step 2: Convert to fraction form
    12,778.80/19,168.28 = 4,458.78/x
  3. Step 3: Cross multiply
    12,778.80x = 19,168.28 × 4,458.78
  4. Step 4: Simplify right side
    12,778.80x = 85,467,143.50
  5. Step 5: Solve for x
    x = 85,467,143.50/12,778.80
  6. Step 6: Final answer
    x = 6,688.20

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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.