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Finding the Fourth Proportional to 15,081.92, 20,812.11 and 9,110.06

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Solution

The fourth proportional to 15,081.92, 20,812.11 and 9,110.06 is: 12,571.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.92 : 20,812.11 = 9,110.06 : x
  2. Step 2: Convert to fraction form
    15,081.92/20,812.11 = 9,110.06/x
  3. Step 3: Cross multiply
    15,081.92x = 20,812.11 × 9,110.06
  4. Step 4: Simplify right side
    15,081.92x = 189,599,570.83
  5. Step 5: Solve for x
    x = 189,599,570.83/15,081.92
  6. Step 6: Final answer
    x = 12,571.32

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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.