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Finding the Fourth Proportional to 7,040.85, 9,718.81 and 4,057.88

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Solution

The fourth proportional to 7,040.85, 9,718.81 and 4,057.88 is: 5,601.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040.85 : 9,718.81 = 4,057.88 : x
  2. Step 2: Convert to fraction form
    7,040.85/9,718.81 = 4,057.88/x
  3. Step 3: Cross multiply
    7,040.85x = 9,718.81 × 4,057.88
  4. Step 4: Simplify right side
    7,040.85x = 39,437,764.72
  5. Step 5: Solve for x
    x = 39,437,764.72/7,040.85
  6. Step 6: Final answer
    x = 5,601.28

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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.