Home / 21,115.84-31,671.32-5,534.68

Finding the Fourth Proportional to 21,115.84, 31,671.32 and 5,534.68

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Solution

The fourth proportional to 21,115.84, 31,671.32 and 5,534.68 is: 8,301.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.84 : 31,671.32 = 5,534.68 : x
  2. Step 2: Convert to fraction form
    21,115.84/31,671.32 = 5,534.68/x
  3. Step 3: Cross multiply
    21,115.84x = 31,671.32 × 5,534.68
  4. Step 4: Simplify right side
    21,115.84x = 175,290,621.38
  5. Step 5: Solve for x
    x = 175,290,621.38/21,115.84
  6. Step 6: Final answer
    x = 8,301.38

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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.