Home / 12,621.16-18,928.50-6,689.98

Finding the Fourth Proportional to 12,621.16, 18,928.50 and 6,689.98

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Solution

The fourth proportional to 12,621.16, 18,928.50 and 6,689.98 is: 10,033.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.16 : 18,928.50 = 6,689.98 : x
  2. Step 2: Convert to fraction form
    12,621.16/18,928.50 = 6,689.98/x
  3. Step 3: Cross multiply
    12,621.16x = 18,928.50 × 6,689.98
  4. Step 4: Simplify right side
    12,621.16x = 126,631,286.43
  5. Step 5: Solve for x
    x = 126,631,286.43/12,621.16
  6. Step 6: Final answer
    x = 10,033.25

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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.