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Finding the Fourth Proportional to 9,105.60, 13,658.40 and 8,558.40

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Solution

The fourth proportional to 9,105.60, 13,658.40 and 8,558.40 is: 12,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,105.60 : 13,658.40 = 8,558.40 : x
  2. Step 2: Convert to fraction form
    9,105.60/13,658.40 = 8,558.40/x
  3. Step 3: Cross multiply
    9,105.60x = 13,658.40 × 8,558.40
  4. Step 4: Simplify right side
    9,105.60x = 116,894,050.56
  5. Step 5: Solve for x
    x = 116,894,050.56/9,105.60
  6. Step 6: Final answer
    x = 12,837.60

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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.