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Finding the Fourth Proportional to 8,850.40, 13,207.08 and 7,868.80

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Solution

The fourth proportional to 8,850.40, 13,207.08 and 7,868.80 is: 11,742.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,850.40 : 13,207.08 = 7,868.80 : x
  2. Step 2: Convert to fraction form
    8,850.40/13,207.08 = 7,868.80/x
  3. Step 3: Cross multiply
    8,850.40x = 13,207.08 × 7,868.80
  4. Step 4: Simplify right side
    8,850.40x = 103,923,871.10
  5. Step 5: Solve for x
    x = 103,923,871.10/8,850.40
  6. Step 6: Final answer
    x = 11,742.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.