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Finding the Fourth Proportional to 12,120.70, 16,725.08 and 7,017.10

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Solution

The fourth proportional to 12,120.70, 16,725.08 and 7,017.10 is: 9,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.70 : 16,725.08 = 7,017.10 : x
  2. Step 2: Convert to fraction form
    12,120.70/16,725.08 = 7,017.10/x
  3. Step 3: Cross multiply
    12,120.70x = 16,725.08 × 7,017.10
  4. Step 4: Simplify right side
    12,120.70x = 117,361,558.87
  5. Step 5: Solve for x
    x = 117,361,558.87/12,120.70
  6. Step 6: Final answer
    x = 9,682.74

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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.