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Finding the Fourth Proportional to 8,750.70, 13,128.01 and 3,203.93

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Solution

The fourth proportional to 8,750.70, 13,128.01 and 3,203.93 is: 4,806.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,750.70 : 13,128.01 = 3,203.93 : x
  2. Step 2: Convert to fraction form
    8,750.70/13,128.01 = 3,203.93/x
  3. Step 3: Cross multiply
    8,750.70x = 13,128.01 × 3,203.93
  4. Step 4: Simplify right side
    8,750.70x = 42,061,249.89
  5. Step 5: Solve for x
    x = 42,061,249.89/8,750.70
  6. Step 6: Final answer
    x = 4,806.62

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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.