Home / 20,834.64-31,363.54-18,691.38

Finding the Fourth Proportional to 20,834.64, 31,363.54 and 18,691.38

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Solution

The fourth proportional to 20,834.64, 31,363.54 and 18,691.38 is: 28,137.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.64 : 31,363.54 = 18,691.38 : x
  2. Step 2: Convert to fraction form
    20,834.64/31,363.54 = 18,691.38/x
  3. Step 3: Cross multiply
    20,834.64x = 31,363.54 × 18,691.38
  4. Step 4: Simplify right side
    20,834.64x = 586,227,594.01
  5. Step 5: Solve for x
    x = 586,227,594.01/20,834.64
  6. Step 6: Final answer
    x = 28,137.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.