Home / 20,622.17-28,458.68-11,190.80

Finding the Fourth Proportional to 20,622.17, 28,458.68 and 11,190.80

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Solution

The fourth proportional to 20,622.17, 28,458.68 and 11,190.80 is: 15,443.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.17 : 28,458.68 = 11,190.80 : x
  2. Step 2: Convert to fraction form
    20,622.17/28,458.68 = 11,190.80/x
  3. Step 3: Cross multiply
    20,622.17x = 28,458.68 × 11,190.80
  4. Step 4: Simplify right side
    20,622.17x = 318,475,197.90
  5. Step 5: Solve for x
    x = 318,475,197.90/20,622.17
  6. Step 6: Final answer
    x = 15,443.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.