Home / 13,787.40-20,681.20-3,926.66

Finding the Fourth Proportional to 13,787.40, 20,681.20 and 3,926.66

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Solution

The fourth proportional to 13,787.40, 20,681.20 and 3,926.66 is: 5,890.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.40 : 20,681.20 = 3,926.66 : x
  2. Step 2: Convert to fraction form
    13,787.40/20,681.20 = 3,926.66/x
  3. Step 3: Cross multiply
    13,787.40x = 20,681.20 × 3,926.66
  4. Step 4: Simplify right side
    13,787.40x = 81,208,040.79
  5. Step 5: Solve for x
    x = 81,208,040.79/13,787.40
  6. Step 6: Final answer
    x = 5,890.02

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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.