Home / 10,778.15-16,161.75-4,929.75

Finding the Fourth Proportional to 10,778.15, 16,161.75 and 4,929.75

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Solution

The fourth proportional to 10,778.15, 16,161.75 and 4,929.75 is: 7,392.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,778.15 : 16,161.75 = 4,929.75 : x
  2. Step 2: Convert to fraction form
    10,778.15/16,161.75 = 4,929.75/x
  3. Step 3: Cross multiply
    10,778.15x = 16,161.75 × 4,929.75
  4. Step 4: Simplify right side
    10,778.15x = 79,673,387.06
  5. Step 5: Solve for x
    x = 79,673,387.06/10,778.15
  6. Step 6: Final answer
    x = 7,392.12

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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.