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Finding the Fourth Proportional to 15,079.09, 20,809.17 and 8,792.68

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Solution

The fourth proportional to 15,079.09, 20,809.17 and 8,792.68 is: 12,133.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.09 : 20,809.17 = 8,792.68 : x
  2. Step 2: Convert to fraction form
    15,079.09/20,809.17 = 8,792.68/x
  3. Step 3: Cross multiply
    15,079.09x = 20,809.17 × 8,792.68
  4. Step 4: Simplify right side
    15,079.09x = 182,968,372.88
  5. Step 5: Solve for x
    x = 182,968,372.88/15,079.09
  6. Step 6: Final answer
    x = 12,133.91

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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.