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Finding the Fourth Proportional to 15,119.16, 20,869.56 and 8,836.80

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Solution

The fourth proportional to 15,119.16, 20,869.56 and 8,836.80 is: 12,197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.16 : 20,869.56 = 8,836.80 : x
  2. Step 2: Convert to fraction form
    15,119.16/20,869.56 = 8,836.80/x
  3. Step 3: Cross multiply
    15,119.16x = 20,869.56 × 8,836.80
  4. Step 4: Simplify right side
    15,119.16x = 184,420,127.81
  5. Step 5: Solve for x
    x = 184,420,127.81/15,119.16
  6. Step 6: Final answer
    x = 12,197.78

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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.