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Finding the Fourth Proportional to 10,778.80, 16,175.40 and 4,932.40

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Solution

The fourth proportional to 10,778.80, 16,175.40 and 4,932.40 is: 7,401.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,778.80 : 16,175.40 = 4,932.40 : x
  2. Step 2: Convert to fraction form
    10,778.80/16,175.40 = 4,932.40/x
  3. Step 3: Cross multiply
    10,778.80x = 16,175.40 × 4,932.40
  4. Step 4: Simplify right side
    10,778.80x = 79,783,542.96
  5. Step 5: Solve for x
    x = 79,783,542.96/10,778.80
  6. Step 6: Final answer
    x = 7,401.89

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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.