Home / 11,109.66-15,324.30-7,135.80

Finding the Fourth Proportional to 11,109.66, 15,324.30 and 7,135.80

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Solution

The fourth proportional to 11,109.66, 15,324.30 and 7,135.80 is: 9,842.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.66 : 15,324.30 = 7,135.80 : x
  2. Step 2: Convert to fraction form
    11,109.66/15,324.30 = 7,135.80/x
  3. Step 3: Cross multiply
    11,109.66x = 15,324.30 × 7,135.80
  4. Step 4: Simplify right side
    11,109.66x = 109,351,139.94
  5. Step 5: Solve for x
    x = 109,351,139.94/11,109.66
  6. Step 6: Final answer
    x = 9,842.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.