Home / 20,961.35-31,411.14-15,671.54

Finding the Fourth Proportional to 20,961.35, 31,411.14 and 15,671.54

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Solution

The fourth proportional to 20,961.35, 31,411.14 and 15,671.54 is: 23,484.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.35 : 31,411.14 = 15,671.54 : x
  2. Step 2: Convert to fraction form
    20,961.35/31,411.14 = 15,671.54/x
  3. Step 3: Cross multiply
    20,961.35x = 31,411.14 × 15,671.54
  4. Step 4: Simplify right side
    20,961.35x = 492,260,936.96
  5. Step 5: Solve for x
    x = 492,260,936.96/20,961.35
  6. Step 6: Final answer
    x = 23,484.22

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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.