Home / 21,314.48-31,971.83-5,518.41

Finding the Fourth Proportional to 21,314.48, 31,971.83 and 5,518.41

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Solution

The fourth proportional to 21,314.48, 31,971.83 and 5,518.41 is: 8,277.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.48 : 31,971.83 = 5,518.41 : x
  2. Step 2: Convert to fraction form
    21,314.48/31,971.83 = 5,518.41/x
  3. Step 3: Cross multiply
    21,314.48x = 31,971.83 × 5,518.41
  4. Step 4: Simplify right side
    21,314.48x = 176,433,506.53
  5. Step 5: Solve for x
    x = 176,433,506.53/21,314.48
  6. Step 6: Final answer
    x = 8,277.64

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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.