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Finding the Fourth Proportional to 17,127.20, 25,642.20 and 13,206.80

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Solution

The fourth proportional to 17,127.20, 25,642.20 and 13,206.80 is: 19,772.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,127.20 : 25,642.20 = 13,206.80 : x
  2. Step 2: Convert to fraction form
    17,127.20/25,642.20 = 13,206.80/x
  3. Step 3: Cross multiply
    17,127.20x = 25,642.20 × 13,206.80
  4. Step 4: Simplify right side
    17,127.20x = 338,651,406.96
  5. Step 5: Solve for x
    x = 338,651,406.96/17,127.20
  6. Step 6: Final answer
    x = 19,772.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.