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Finding the Fourth Proportional to 17,143.60, 25,720.20 and 7,287.60

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Solution

The fourth proportional to 17,143.60, 25,720.20 and 7,287.60 is: 10,933.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,143.60 : 25,720.20 = 7,287.60 : x
  2. Step 2: Convert to fraction form
    17,143.60/25,720.20 = 7,287.60/x
  3. Step 3: Cross multiply
    17,143.60x = 25,720.20 × 7,287.60
  4. Step 4: Simplify right side
    17,143.60x = 187,438,529.52
  5. Step 5: Solve for x
    x = 187,438,529.52/17,143.60
  6. Step 6: Final answer
    x = 10,933.44

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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.