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Finding the Fourth Proportional to 20,499.84, 30,749.76 and 11,740.32

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Solution

The fourth proportional to 20,499.84, 30,749.76 and 11,740.32 is: 17,610.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.84 : 30,749.76 = 11,740.32 : x
  2. Step 2: Convert to fraction form
    20,499.84/30,749.76 = 11,740.32/x
  3. Step 3: Cross multiply
    20,499.84x = 30,749.76 × 11,740.32
  4. Step 4: Simplify right side
    20,499.84x = 361,012,022.32
  5. Step 5: Solve for x
    x = 361,012,022.32/20,499.84
  6. Step 6: Final answer
    x = 17,610.48

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Similar ratio
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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.