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Finding the Fourth Proportional to 5,069.40, 7,019.10 and 4,939.80

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Solution

The fourth proportional to 5,069.40, 7,019.10 and 4,939.80 is: 6,839.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,069.40 : 7,019.10 = 4,939.80 : x
  2. Step 2: Convert to fraction form
    5,069.40/7,019.10 = 4,939.80/x
  3. Step 3: Cross multiply
    5,069.40x = 7,019.10 × 4,939.80
  4. Step 4: Simplify right side
    5,069.40x = 34,672,950.18
  5. Step 5: Solve for x
    x = 34,672,950.18/5,069.40
  6. Step 6: Final answer
    x = 6,839.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.