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Finding the Fourth Proportional to 20,486.96, 30,722.88 and 7,335.84

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Solution

The fourth proportional to 20,486.96, 30,722.88 and 7,335.84 is: 11,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.96 : 30,722.88 = 7,335.84 : x
  2. Step 2: Convert to fraction form
    20,486.96/30,722.88 = 7,335.84/x
  3. Step 3: Cross multiply
    20,486.96x = 30,722.88 × 7,335.84
  4. Step 4: Simplify right side
    20,486.96x = 225,378,132.02
  5. Step 5: Solve for x
    x = 225,378,132.02/20,486.96
  6. Step 6: Final answer
    x = 11,001.05

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1.5x scale

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.