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Finding the Fourth Proportional to 5,589.88, 7,717.08 and 3,916.42

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Solution

The fourth proportional to 5,589.88, 7,717.08 and 3,916.42 is: 5,406.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,589.88 : 7,717.08 = 3,916.42 : x
  2. Step 2: Convert to fraction form
    5,589.88/7,717.08 = 3,916.42/x
  3. Step 3: Cross multiply
    5,589.88x = 7,717.08 × 3,916.42
  4. Step 4: Simplify right side
    5,589.88x = 30,223,326.45
  5. Step 5: Solve for x
    x = 30,223,326.45/5,589.88
  6. Step 6: Final answer
    x = 5,406.79

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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.