Home / 20,981.76-31,473.76-5,399.52

Finding the Fourth Proportional to 20,981.76, 31,473.76 and 5,399.52

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Solution

The fourth proportional to 20,981.76, 31,473.76 and 5,399.52 is: 8,099.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.76 : 31,473.76 = 5,399.52 : x
  2. Step 2: Convert to fraction form
    20,981.76/31,473.76 = 5,399.52/x
  3. Step 3: Cross multiply
    20,981.76x = 31,473.76 × 5,399.52
  4. Step 4: Simplify right side
    20,981.76x = 169,943,196.60
  5. Step 5: Solve for x
    x = 169,943,196.60/20,981.76
  6. Step 6: Final answer
    x = 8,099.57

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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.