Home / 12,121.80-16,725.09-7,404.36

Finding the Fourth Proportional to 12,121.80, 16,725.09 and 7,404.36

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Solution

The fourth proportional to 12,121.80, 16,725.09 and 7,404.36 is: 10,216.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.80 : 16,725.09 = 7,404.36 : x
  2. Step 2: Convert to fraction form
    12,121.80/16,725.09 = 7,404.36/x
  3. Step 3: Cross multiply
    12,121.80x = 16,725.09 × 7,404.36
  4. Step 4: Simplify right side
    12,121.80x = 123,838,587.39
  5. Step 5: Solve for x
    x = 123,838,587.39/12,121.80
  6. Step 6: Final answer
    x = 10,216.19

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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.