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Finding the Fourth Proportional to 20,148.99, 30,223.49 and 5,358.52

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Solution

The fourth proportional to 20,148.99, 30,223.49 and 5,358.52 is: 8,037.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,148.99 : 30,223.49 = 5,358.52 : x
  2. Step 2: Convert to fraction form
    20,148.99/30,223.49 = 5,358.52/x
  3. Step 3: Cross multiply
    20,148.99x = 30,223.49 × 5,358.52
  4. Step 4: Simplify right side
    20,148.99x = 161,953,175.63
  5. Step 5: Solve for x
    x = 161,953,175.63/20,148.99
  6. Step 6: Final answer
    x = 8,037.78

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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.