Home / 19,128.40-28,611.60-17,168.20

Finding the Fourth Proportional to 19,128.40, 28,611.60 and 17,168.20

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Solution

The fourth proportional to 19,128.40, 28,611.60 and 17,168.20 is: 25,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.40 : 28,611.60 = 17,168.20 : x
  2. Step 2: Convert to fraction form
    19,128.40/28,611.60 = 17,168.20/x
  3. Step 3: Cross multiply
    19,128.40x = 28,611.60 × 17,168.20
  4. Step 4: Simplify right side
    19,128.40x = 491,209,671.12
  5. Step 5: Solve for x
    x = 491,209,671.12/19,128.40
  6. Step 6: Final answer
    x = 25,679.60

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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.