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Finding the Fourth Proportional to 9,077.87, 13,620.72 and 4,920.86

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Solution

The fourth proportional to 9,077.87, 13,620.72 and 4,920.86 is: 7,383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,077.87 : 13,620.72 = 4,920.86 : x
  2. Step 2: Convert to fraction form
    9,077.87/13,620.72 = 4,920.86/x
  3. Step 3: Cross multiply
    9,077.87x = 13,620.72 × 4,920.86
  4. Step 4: Simplify right side
    9,077.87x = 67,025,588.12
  5. Step 5: Solve for x
    x = 67,025,588.12/9,077.87
  6. Step 6: Final answer
    x = 7,383.41

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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.