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Finding the Fourth Proportional to 7,163.74, 9,885.70 and 3,977.17

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Solution

The fourth proportional to 7,163.74, 9,885.70 and 3,977.17 is: 5,488.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.74 : 9,885.70 = 3,977.17 : x
  2. Step 2: Convert to fraction form
    7,163.74/9,885.70 = 3,977.17/x
  3. Step 3: Cross multiply
    7,163.74x = 9,885.70 × 3,977.17
  4. Step 4: Simplify right side
    7,163.74x = 39,317,089.58
  5. Step 5: Solve for x
    x = 39,317,089.58/7,163.74
  6. Step 6: Final answer
    x = 5,488.35

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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.