Home / 11,478.90-17,217.85-3,159.80

Finding the Fourth Proportional to 11,478.90, 17,217.85 and 3,159.80

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Solution

The fourth proportional to 11,478.90, 17,217.85 and 3,159.80 is: 4,739.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.90 : 17,217.85 = 3,159.80 : x
  2. Step 2: Convert to fraction form
    11,478.90/17,217.85 = 3,159.80/x
  3. Step 3: Cross multiply
    11,478.90x = 17,217.85 × 3,159.80
  4. Step 4: Simplify right side
    11,478.90x = 54,404,962.43
  5. Step 5: Solve for x
    x = 54,404,962.43/11,478.90
  6. Step 6: Final answer
    x = 4,739.56

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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.