Home / 20,200.84-30,313.88-7,721.92

Finding the Fourth Proportional to 20,200.84, 30,313.88 and 7,721.92

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Solution

The fourth proportional to 20,200.84, 30,313.88 and 7,721.92 is: 11,587.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,200.84 : 30,313.88 = 7,721.92 : x
  2. Step 2: Convert to fraction form
    20,200.84/30,313.88 = 7,721.92/x
  3. Step 3: Cross multiply
    20,200.84x = 30,313.88 × 7,721.92
  4. Step 4: Simplify right side
    20,200.84x = 234,081,356.25
  5. Step 5: Solve for x
    x = 234,081,356.25/20,200.84
  6. Step 6: Final answer
    x = 11,587.70

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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.