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Finding the Fourth Proportional to 30,239.76, 45,299.76 and 20,728.68

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Solution

The fourth proportional to 30,239.76, 45,299.76 and 20,728.68 is: 31,051.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,239.76 : 45,299.76 = 20,728.68 : x
  2. Step 2: Convert to fraction form
    30,239.76/45,299.76 = 20,728.68/x
  3. Step 3: Cross multiply
    30,239.76x = 45,299.76 × 20,728.68
  4. Step 4: Simplify right side
    30,239.76x = 939,004,229.12
  5. Step 5: Solve for x
    x = 939,004,229.12/30,239.76
  6. Step 6: Final answer
    x = 31,051.97

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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.