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Finding the Fourth Proportional to 19,172.88, 28,759.16 and 7,494.24

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Solution

The fourth proportional to 19,172.88, 28,759.16 and 7,494.24 is: 11,241.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,172.88 : 28,759.16 = 7,494.24 : x
  2. Step 2: Convert to fraction form
    19,172.88/28,759.16 = 7,494.24/x
  3. Step 3: Cross multiply
    19,172.88x = 28,759.16 × 7,494.24
  4. Step 4: Simplify right side
    19,172.88x = 215,528,047.24
  5. Step 5: Solve for x
    x = 215,528,047.24/19,172.88
  6. Step 6: Final answer
    x = 11,241.30

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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.