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Finding the Fourth Proportional to 8,966.70, 12,356.55 and 8,857.35

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Solution

The fourth proportional to 8,966.70, 12,356.55 and 8,857.35 is: 12,205.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,966.70 : 12,356.55 = 8,857.35 : x
  2. Step 2: Convert to fraction form
    8,966.70/12,356.55 = 8,857.35/x
  3. Step 3: Cross multiply
    8,966.70x = 12,356.55 × 8,857.35
  4. Step 4: Simplify right side
    8,966.70x = 109,446,288.14
  5. Step 5: Solve for x
    x = 109,446,288.14/8,966.70
  6. Step 6: Final answer
    x = 12,205.86

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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.