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Finding the Fourth Proportional to 8,911.85, 13,292.41 and 8,397.91

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Solution

The fourth proportional to 8,911.85, 13,292.41 and 8,397.91 is: 12,525.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.85 : 13,292.41 = 8,397.91 : x
  2. Step 2: Convert to fraction form
    8,911.85/13,292.41 = 8,397.91/x
  3. Step 3: Cross multiply
    8,911.85x = 13,292.41 × 8,397.91
  4. Step 4: Simplify right side
    8,911.85x = 111,628,408.64
  5. Step 5: Solve for x
    x = 111,628,408.64/8,911.85
  6. Step 6: Final answer
    x = 12,525.84

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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.