Home / 13,782.84-20,671.16-3,921.90

Finding the Fourth Proportional to 13,782.84, 20,671.16 and 3,921.90

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Solution

The fourth proportional to 13,782.84, 20,671.16 and 3,921.90 is: 5,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,782.84 : 20,671.16 = 3,921.90 : x
  2. Step 2: Convert to fraction form
    13,782.84/20,671.16 = 3,921.90/x
  3. Step 3: Cross multiply
    13,782.84x = 20,671.16 × 3,921.90
  4. Step 4: Simplify right side
    13,782.84x = 81,070,222.40
  5. Step 5: Solve for x
    x = 81,070,222.40/13,782.84
  6. Step 6: Final answer
    x = 5,881.97

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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.