Home / 10,787.49-16,166.79-7,991.37

Finding the Fourth Proportional to 10,787.49, 16,166.79 and 7,991.37

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Solution

The fourth proportional to 10,787.49, 16,166.79 and 7,991.37 is: 11,976.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,787.49 : 16,166.79 = 7,991.37 : x
  2. Step 2: Convert to fraction form
    10,787.49/16,166.79 = 7,991.37/x
  3. Step 3: Cross multiply
    10,787.49x = 16,166.79 × 7,991.37
  4. Step 4: Simplify right side
    10,787.49x = 129,194,800.60
  5. Step 5: Solve for x
    x = 129,194,800.60/10,787.49
  6. Step 6: Final answer
    x = 11,976.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.