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Finding the Fourth Proportional to 22,690.80, 34,028.10 and 7,900.20

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Solution

The fourth proportional to 22,690.80, 34,028.10 and 7,900.20 is: 11,847.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,690.80 : 34,028.10 = 7,900.20 : x
  2. Step 2: Convert to fraction form
    22,690.80/34,028.10 = 7,900.20/x
  3. Step 3: Cross multiply
    22,690.80x = 34,028.10 × 7,900.20
  4. Step 4: Simplify right side
    22,690.80x = 268,828,795.62
  5. Step 5: Solve for x
    x = 268,828,795.62/22,690.80
  6. Step 6: Final answer
    x = 11,847.48

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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.