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Finding the Fourth Proportional to 8,815.20, 13,237.20 and 5,906.40

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Solution

The fourth proportional to 8,815.20, 13,237.20 and 5,906.40 is: 8,869.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.20 : 13,237.20 = 5,906.40 : x
  2. Step 2: Convert to fraction form
    8,815.20/13,237.20 = 5,906.40/x
  3. Step 3: Cross multiply
    8,815.20x = 13,237.20 × 5,906.40
  4. Step 4: Simplify right side
    8,815.20x = 78,184,198.08
  5. Step 5: Solve for x
    x = 78,184,198.08/8,815.20
  6. Step 6: Final answer
    x = 8,869.25

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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.