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Finding the Fourth Proportional to 8,631.87, 12,871.81 and 7,950.25

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Solution

The fourth proportional to 8,631.87, 12,871.81 and 7,950.25 is: 11,855.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.87 : 12,871.81 = 7,950.25 : x
  2. Step 2: Convert to fraction form
    8,631.87/12,871.81 = 7,950.25/x
  3. Step 3: Cross multiply
    8,631.87x = 12,871.81 × 7,950.25
  4. Step 4: Simplify right side
    8,631.87x = 102,334,133.48
  5. Step 5: Solve for x
    x = 102,334,133.48/8,631.87
  6. Step 6: Final answer
    x = 11,855.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.