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Finding the Fourth Proportional to 8,913.72, 13,355.46 and 5,443.68

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Solution

The fourth proportional to 8,913.72, 13,355.46 and 5,443.68 is: 8,156.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.72 : 13,355.46 = 5,443.68 : x
  2. Step 2: Convert to fraction form
    8,913.72/13,355.46 = 5,443.68/x
  3. Step 3: Cross multiply
    8,913.72x = 13,355.46 × 5,443.68
  4. Step 4: Simplify right side
    8,913.72x = 72,702,850.49
  5. Step 5: Solve for x
    x = 72,702,850.49/8,913.72
  6. Step 6: Final answer
    x = 8,156.29

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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.