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Finding the Fourth Proportional to 8,358.74, 12,538.20 and 3,424.94

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Solution

The fourth proportional to 8,358.74, 12,538.20 and 3,424.94 is: 5,137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,358.74 : 12,538.20 = 3,424.94 : x
  2. Step 2: Convert to fraction form
    8,358.74/12,538.20 = 3,424.94/x
  3. Step 3: Cross multiply
    8,358.74x = 12,538.20 × 3,424.94
  4. Step 4: Simplify right side
    8,358.74x = 42,942,582.71
  5. Step 5: Solve for x
    x = 42,942,582.71/8,358.74
  6. Step 6: Final answer
    x = 5,137.45

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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.