Home / 13,981.29-20,971.79-5,659.05

Finding the Fourth Proportional to 13,981.29, 20,971.79 and 5,659.05

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Solution

The fourth proportional to 13,981.29, 20,971.79 and 5,659.05 is: 8,488.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.29 : 20,971.79 = 5,659.05 : x
  2. Step 2: Convert to fraction form
    13,981.29/20,971.79 = 5,659.05/x
  3. Step 3: Cross multiply
    13,981.29x = 20,971.79 × 5,659.05
  4. Step 4: Simplify right side
    13,981.29x = 118,680,379.90
  5. Step 5: Solve for x
    x = 118,680,379.90/13,981.29
  6. Step 6: Final answer
    x = 8,488.51

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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.