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Finding the Fourth Proportional to 12,116.80, 16,710.06 and 7,863.40

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Solution

The fourth proportional to 12,116.80, 16,710.06 and 7,863.40 is: 10,844.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.80 : 16,710.06 = 7,863.40 : x
  2. Step 2: Convert to fraction form
    12,116.80/16,710.06 = 7,863.40/x
  3. Step 3: Cross multiply
    12,116.80x = 16,710.06 × 7,863.40
  4. Step 4: Simplify right side
    12,116.80x = 131,397,885.80
  5. Step 5: Solve for x
    x = 131,397,885.80/12,116.80
  6. Step 6: Final answer
    x = 10,844.27

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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.