Home / 12,120.12-16,725.69-6,815.00

Finding the Fourth Proportional to 12,120.12, 16,725.69 and 6,815.00

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Solution

The fourth proportional to 12,120.12, 16,725.69 and 6,815.00 is: 9,404.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.12 : 16,725.69 = 6,815.00 : x
  2. Step 2: Convert to fraction form
    12,120.12/16,725.69 = 6,815.00/x
  3. Step 3: Cross multiply
    12,120.12x = 16,725.69 × 6,815.00
  4. Step 4: Simplify right side
    12,120.12x = 113,985,619.16
  5. Step 5: Solve for x
    x = 113,985,619.16/12,120.12
  6. Step 6: Final answer
    x = 9,404.66

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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.