Home / 13,818.39-20,721.50-3,955.43

Finding the Fourth Proportional to 13,818.39, 20,721.50 and 3,955.43

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Solution

The fourth proportional to 13,818.39, 20,721.50 and 3,955.43 is: 5,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.39 : 20,721.50 = 3,955.43 : x
  2. Step 2: Convert to fraction form
    13,818.39/20,721.50 = 3,955.43/x
  3. Step 3: Cross multiply
    13,818.39x = 20,721.50 × 3,955.43
  4. Step 4: Simplify right side
    13,818.39x = 81,962,422.97
  5. Step 5: Solve for x
    x = 81,962,422.97/13,818.39
  6. Step 6: Final answer
    x = 5,931.40

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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.