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Finding the Fourth Proportional to 8,807.60, 12,155.40 and 5,620.94

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Solution

The fourth proportional to 8,807.60, 12,155.40 and 5,620.94 is: 7,757.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.60 : 12,155.40 = 5,620.94 : x
  2. Step 2: Convert to fraction form
    8,807.60/12,155.40 = 5,620.94/x
  3. Step 3: Cross multiply
    8,807.60x = 12,155.40 × 5,620.94
  4. Step 4: Simplify right side
    8,807.60x = 68,324,774.08
  5. Step 5: Solve for x
    x = 68,324,774.08/8,807.60
  6. Step 6: Final answer
    x = 7,757.48

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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.