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Finding the Fourth Proportional to 20,491.70, 30,737.55 and 20,338.10

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Solution

The fourth proportional to 20,491.70, 30,737.55 and 20,338.10 is: 30,507.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.70 : 30,737.55 = 20,338.10 : x
  2. Step 2: Convert to fraction form
    20,491.70/30,737.55 = 20,338.10/x
  3. Step 3: Cross multiply
    20,491.70x = 30,737.55 × 20,338.10
  4. Step 4: Simplify right side
    20,491.70x = 625,143,365.66
  5. Step 5: Solve for x
    x = 625,143,365.66/20,491.70
  6. Step 6: Final answer
    x = 30,507.15

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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.