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Finding the Fourth Proportional to 17,145.60, 25,660.80 and 15,763.20

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Solution

The fourth proportional to 17,145.60, 25,660.80 and 15,763.20 is: 23,591.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,145.60 : 25,660.80 = 15,763.20 : x
  2. Step 2: Convert to fraction form
    17,145.60/25,660.80 = 15,763.20/x
  3. Step 3: Cross multiply
    17,145.60x = 25,660.80 × 15,763.20
  4. Step 4: Simplify right side
    17,145.60x = 404,496,322.56
  5. Step 5: Solve for x
    x = 404,496,322.56/17,145.60
  6. Step 6: Final answer
    x = 23,591.84

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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.