Home / 28,259.20-42,388.80-17,187.60

Finding the Fourth Proportional to 28,259.20, 42,388.80 and 17,187.60

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Solution

The fourth proportional to 28,259.20, 42,388.80 and 17,187.60 is: 25,781.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,259.20 : 42,388.80 = 17,187.60 : x
  2. Step 2: Convert to fraction form
    28,259.20/42,388.80 = 17,187.60/x
  3. Step 3: Cross multiply
    28,259.20x = 42,388.80 × 17,187.60
  4. Step 4: Simplify right side
    28,259.20x = 728,561,738.88
  5. Step 5: Solve for x
    x = 728,561,738.88/28,259.20
  6. Step 6: Final answer
    x = 25,781.40

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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.