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Finding the Fourth Proportional to 9,358.21, 12,913.81 and 5,821.39

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Solution

The fourth proportional to 9,358.21, 12,913.81 and 5,821.39 is: 8,033.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,358.21 : 12,913.81 = 5,821.39 : x
  2. Step 2: Convert to fraction form
    9,358.21/12,913.81 = 5,821.39/x
  3. Step 3: Cross multiply
    9,358.21x = 12,913.81 × 5,821.39
  4. Step 4: Simplify right side
    9,358.21x = 75,176,324.40
  5. Step 5: Solve for x
    x = 75,176,324.40/9,358.21
  6. Step 6: Final answer
    x = 8,033.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.