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Finding the Fourth Proportional to 20,031, 30,040.11 and 6,880.20

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Solution

The fourth proportional to 20,031, 30,040.11 and 6,880.20 is: 10,318.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,031 : 30,040.11 = 6,880.20 : x
  2. Step 2: Convert to fraction form
    20,031/30,040.11 = 6,880.20/x
  3. Step 3: Cross multiply
    20,031x = 30,040.11 × 6,880.20
  4. Step 4: Simplify right side
    20,031x = 206,681,964.82
  5. Step 5: Solve for x
    x = 206,681,964.82/20,031
  6. Step 6: Final answer
    x = 10,318.11

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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.