Home / 7,020.45-9,687.87-3,876.57

Finding the Fourth Proportional to 7,020.45, 9,687.87 and 3,876.57

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Solution

The fourth proportional to 7,020.45, 9,687.87 and 3,876.57 is: 5,349.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.45 : 9,687.87 = 3,876.57 : x
  2. Step 2: Convert to fraction form
    7,020.45/9,687.87 = 3,876.57/x
  3. Step 3: Cross multiply
    7,020.45x = 9,687.87 × 3,876.57
  4. Step 4: Simplify right side
    7,020.45x = 37,555,706.21
  5. Step 5: Solve for x
    x = 37,555,706.21/7,020.45
  6. Step 6: Final answer
    x = 5,349.47

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1.5x scale

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.