Home / 12,120.64-16,725.90-6,815.96

Finding the Fourth Proportional to 12,120.64, 16,725.90 and 6,815.96

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Solution

The fourth proportional to 12,120.64, 16,725.90 and 6,815.96 is: 9,405.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.64 : 16,725.90 = 6,815.96 : x
  2. Step 2: Convert to fraction form
    12,120.64/16,725.90 = 6,815.96/x
  3. Step 3: Cross multiply
    12,120.64x = 16,725.90 × 6,815.96
  4. Step 4: Simplify right side
    12,120.64x = 114,003,065.36
  5. Step 5: Solve for x
    x = 114,003,065.36/12,120.64
  6. Step 6: Final answer
    x = 9,405.70

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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.