Home / 20,712.04-31,065.90-5,920

Finding the Fourth Proportional to 20,712.04, 31,065.90 and 5,920

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Solution

The fourth proportional to 20,712.04, 31,065.90 and 5,920 is: 8,879.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.04 : 31,065.90 = 5,920 : x
  2. Step 2: Convert to fraction form
    20,712.04/31,065.90 = 5,920/x
  3. Step 3: Cross multiply
    20,712.04x = 31,065.90 × 5,920
  4. Step 4: Simplify right side
    20,712.04x = 183,910,128
  5. Step 5: Solve for x
    x = 183,910,128/20,712.04
  6. Step 6: Final answer
    x = 8,879.38

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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.