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Finding the Fourth Proportional to 15,065.76, 20,790.54 and 8,351.25

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Solution

The fourth proportional to 15,065.76, 20,790.54 and 8,351.25 is: 11,524.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.76 : 20,790.54 = 8,351.25 : x
  2. Step 2: Convert to fraction form
    15,065.76/20,790.54 = 8,351.25/x
  3. Step 3: Cross multiply
    15,065.76x = 20,790.54 × 8,351.25
  4. Step 4: Simplify right side
    15,065.76x = 173,626,997.18
  5. Step 5: Solve for x
    x = 173,626,997.18/15,065.76
  6. Step 6: Final answer
    x = 11,524.61

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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.