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Finding the Fourth Proportional to 8,857.70, 13,291.35 and 3,928.10

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Solution

The fourth proportional to 8,857.70, 13,291.35 and 3,928.10 is: 5,894.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,857.70 : 13,291.35 = 3,928.10 : x
  2. Step 2: Convert to fraction form
    8,857.70/13,291.35 = 3,928.10/x
  3. Step 3: Cross multiply
    8,857.70x = 13,291.35 × 3,928.10
  4. Step 4: Simplify right side
    8,857.70x = 52,209,751.94
  5. Step 5: Solve for x
    x = 52,209,751.94/8,857.70
  6. Step 6: Final answer
    x = 5,894.28

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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.