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Finding the Fourth Proportional to 8,871.35, 12,243.08 and 5,145.35

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Solution

The fourth proportional to 8,871.35, 12,243.08 and 5,145.35 is: 7,100.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.35 : 12,243.08 = 5,145.35 : x
  2. Step 2: Convert to fraction form
    8,871.35/12,243.08 = 5,145.35/x
  3. Step 3: Cross multiply
    8,871.35x = 12,243.08 × 5,145.35
  4. Step 4: Simplify right side
    8,871.35x = 62,994,936.56
  5. Step 5: Solve for x
    x = 62,994,936.56/8,871.35
  6. Step 6: Final answer
    x = 7,100.94

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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.