Home / 10,990.76-15,169.55-7,455.11

Finding the Fourth Proportional to 10,990.76, 15,169.55 and 7,455.11

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Solution

The fourth proportional to 10,990.76, 15,169.55 and 7,455.11 is: 10,289.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,990.76 : 15,169.55 = 7,455.11 : x
  2. Step 2: Convert to fraction form
    10,990.76/15,169.55 = 7,455.11/x
  3. Step 3: Cross multiply
    10,990.76x = 15,169.55 × 7,455.11
  4. Step 4: Simplify right side
    10,990.76x = 113,090,550.78
  5. Step 5: Solve for x
    x = 113,090,550.78/10,990.76
  6. Step 6: Final answer
    x = 10,289.61

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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.