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Finding the Fourth Proportional to 8,853.21, 12,138.26 and 8,695.26

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Solution

The fourth proportional to 8,853.21, 12,138.26 and 8,695.26 is: 11,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,853.21 : 12,138.26 = 8,695.26 : x
  2. Step 2: Convert to fraction form
    8,853.21/12,138.26 = 8,695.26/x
  3. Step 3: Cross multiply
    8,853.21x = 12,138.26 × 8,695.26
  4. Step 4: Simplify right side
    8,853.21x = 105,545,283.17
  5. Step 5: Solve for x
    x = 105,545,283.17/8,853.21
  6. Step 6: Final answer
    x = 11,921.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.