Home / 8,921.81-13,382.73-2,681.87

Finding the Fourth Proportional to 8,921.81, 13,382.73 and 2,681.87

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Solution

The fourth proportional to 8,921.81, 13,382.73 and 2,681.87 is: 4,022.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.81 : 13,382.73 = 2,681.87 : x
  2. Step 2: Convert to fraction form
    8,921.81/13,382.73 = 2,681.87/x
  3. Step 3: Cross multiply
    8,921.81x = 13,382.73 × 2,681.87
  4. Step 4: Simplify right side
    8,921.81x = 35,890,728.70
  5. Step 5: Solve for x
    x = 35,890,728.70/8,921.81
  6. Step 6: Final answer
    x = 4,022.81

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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.