Home / 20,861.40-31,292.52-6,821.49

Finding the Fourth Proportional to 20,861.40, 31,292.52 and 6,821.49

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Solution

The fourth proportional to 20,861.40, 31,292.52 and 6,821.49 is: 10,232.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.40 : 31,292.52 = 6,821.49 : x
  2. Step 2: Convert to fraction form
    20,861.40/31,292.52 = 6,821.49/x
  3. Step 3: Cross multiply
    20,861.40x = 31,292.52 × 6,821.49
  4. Step 4: Simplify right side
    20,861.40x = 213,461,612.25
  5. Step 5: Solve for x
    x = 213,461,612.25/20,861.40
  6. Step 6: Final answer
    x = 10,232.37

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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.