Home / 28,197.20-42,292.60-7,422.80

Finding the Fourth Proportional to 28,197.20, 42,292.60 and 7,422.80

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Solution

The fourth proportional to 28,197.20, 42,292.60 and 7,422.80 is: 11,133.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,197.20 : 42,292.60 = 7,422.80 : x
  2. Step 2: Convert to fraction form
    28,197.20/42,292.60 = 7,422.80/x
  3. Step 3: Cross multiply
    28,197.20x = 42,292.60 × 7,422.80
  4. Step 4: Simplify right side
    28,197.20x = 313,929,511.28
  5. Step 5: Solve for x
    x = 313,929,511.28/28,197.20
  6. Step 6: Final answer
    x = 11,133.36

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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.