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Finding the Fourth Proportional to 8,961.90, 12,364.26 and 5,235.90

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Solution

The fourth proportional to 8,961.90, 12,364.26 and 5,235.90 is: 7,223.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.90 : 12,364.26 = 5,235.90 : x
  2. Step 2: Convert to fraction form
    8,961.90/12,364.26 = 5,235.90/x
  3. Step 3: Cross multiply
    8,961.90x = 12,364.26 × 5,235.90
  4. Step 4: Simplify right side
    8,961.90x = 64,738,028.93
  5. Step 5: Solve for x
    x = 64,738,028.93/8,961.90
  6. Step 6: Final answer
    x = 7,223.69

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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.