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Finding the Fourth Proportional to 22,722.80, 34,019.40 and 20,130.80

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Solution

The fourth proportional to 22,722.80, 34,019.40 and 20,130.80 is: 30,138.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,722.80 : 34,019.40 = 20,130.80 : x
  2. Step 2: Convert to fraction form
    22,722.80/34,019.40 = 20,130.80/x
  3. Step 3: Cross multiply
    22,722.80x = 34,019.40 × 20,130.80
  4. Step 4: Simplify right side
    22,722.80x = 684,837,737.52
  5. Step 5: Solve for x
    x = 684,837,737.52/22,722.80
  6. Step 6: Final answer
    x = 30,138.79

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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.