Home / 21,113.40-31,671.12-5,531.04

Finding the Fourth Proportional to 21,113.40, 31,671.12 and 5,531.04

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Solution

The fourth proportional to 21,113.40, 31,671.12 and 5,531.04 is: 8,296.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.40 : 31,671.12 = 5,531.04 : x
  2. Step 2: Convert to fraction form
    21,113.40/31,671.12 = 5,531.04/x
  3. Step 3: Cross multiply
    21,113.40x = 31,671.12 × 5,531.04
  4. Step 4: Simplify right side
    21,113.40x = 175,174,231.56
  5. Step 5: Solve for x
    x = 175,174,231.56/21,113.40
  6. Step 6: Final answer
    x = 8,296.83

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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.