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Finding the Fourth Proportional to 20,299.74, 30,448.92 and 7,151.76

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Solution

The fourth proportional to 20,299.74, 30,448.92 and 7,151.76 is: 10,727.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.74 : 30,448.92 = 7,151.76 : x
  2. Step 2: Convert to fraction form
    20,299.74/30,448.92 = 7,151.76/x
  3. Step 3: Cross multiply
    20,299.74x = 30,448.92 × 7,151.76
  4. Step 4: Simplify right side
    20,299.74x = 217,763,368.10
  5. Step 5: Solve for x
    x = 217,763,368.10/20,299.74
  6. Step 6: Final answer
    x = 10,727.40

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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.