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Finding the Fourth Proportional to 15,151.80, 20,911.86 and 14,660.04

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Solution

The fourth proportional to 15,151.80, 20,911.86 and 14,660.04 is: 20,233.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.80 : 20,911.86 = 14,660.04 : x
  2. Step 2: Convert to fraction form
    15,151.80/20,911.86 = 14,660.04/x
  3. Step 3: Cross multiply
    15,151.80x = 20,911.86 × 14,660.04
  4. Step 4: Simplify right side
    15,151.80x = 306,568,704.07
  5. Step 5: Solve for x
    x = 306,568,704.07/15,151.80
  6. Step 6: Final answer
    x = 20,233.15

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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.