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Finding the Fourth Proportional to 9,165.60, 13,784.85 and 8,217.90

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Solution

The fourth proportional to 9,165.60, 13,784.85 and 8,217.90 is: 12,359.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,165.60 : 13,784.85 = 8,217.90 : x
  2. Step 2: Convert to fraction form
    9,165.60/13,784.85 = 8,217.90/x
  3. Step 3: Cross multiply
    9,165.60x = 13,784.85 × 8,217.90
  4. Step 4: Simplify right side
    9,165.60x = 113,282,518.82
  5. Step 5: Solve for x
    x = 113,282,518.82/9,165.60
  6. Step 6: Final answer
    x = 12,359.53

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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.