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Finding the Fourth Proportional to 15,081.34, 20,812.09 and 8,366.80

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Solution

The fourth proportional to 15,081.34, 20,812.09 and 8,366.80 is: 11,546.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.34 : 20,812.09 = 8,366.80 : x
  2. Step 2: Convert to fraction form
    15,081.34/20,812.09 = 8,366.80/x
  3. Step 3: Cross multiply
    15,081.34x = 20,812.09 × 8,366.80
  4. Step 4: Simplify right side
    15,081.34x = 174,130,594.61
  5. Step 5: Solve for x
    x = 174,130,594.61/15,081.34
  6. Step 6: Final answer
    x = 11,546.10

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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.