Home / 13,838.13-20,756.61-6,440.04

Finding the Fourth Proportional to 13,838.13, 20,756.61 and 6,440.04

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Solution

The fourth proportional to 13,838.13, 20,756.61 and 6,440.04 is: 9,659.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,838.13 : 20,756.61 = 6,440.04 : x
  2. Step 2: Convert to fraction form
    13,838.13/20,756.61 = 6,440.04/x
  3. Step 3: Cross multiply
    13,838.13x = 20,756.61 × 6,440.04
  4. Step 4: Simplify right side
    13,838.13x = 133,673,398.66
  5. Step 5: Solve for x
    x = 133,673,398.66/13,838.13
  6. Step 6: Final answer
    x = 9,659.79

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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.