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Finding the Fourth Proportional to 20,379.66, 30,574.08 and 7,232.01

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Solution

The fourth proportional to 20,379.66, 30,574.08 and 7,232.01 is: 10,849.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.66 : 30,574.08 = 7,232.01 : x
  2. Step 2: Convert to fraction form
    20,379.66/30,574.08 = 7,232.01/x
  3. Step 3: Cross multiply
    20,379.66x = 30,574.08 × 7,232.01
  4. Step 4: Simplify right side
    20,379.66x = 221,112,052.30
  5. Step 5: Solve for x
    x = 221,112,052.30/20,379.66
  6. Step 6: Final answer
    x = 10,849.64

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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.