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Finding the Fourth Proportional to 17,145.40, 25,720.80 and 5,459.80

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Solution

The fourth proportional to 17,145.40, 25,720.80 and 5,459.80 is: 8,190.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,145.40 : 25,720.80 = 5,459.80 : x
  2. Step 2: Convert to fraction form
    17,145.40/25,720.80 = 5,459.80/x
  3. Step 3: Cross multiply
    17,145.40x = 25,720.80 × 5,459.80
  4. Step 4: Simplify right side
    17,145.40x = 140,430,423.84
  5. Step 5: Solve for x
    x = 140,430,423.84/17,145.40
  6. Step 6: Final answer
    x = 8,190.56

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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.