Home / 12,221.58-16,868.40-7,443.09

Finding the Fourth Proportional to 12,221.58, 16,868.40 and 7,443.09

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Solution

The fourth proportional to 12,221.58, 16,868.40 and 7,443.09 is: 10,273.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.58 : 16,868.40 = 7,443.09 : x
  2. Step 2: Convert to fraction form
    12,221.58/16,868.40 = 7,443.09/x
  3. Step 3: Cross multiply
    12,221.58x = 16,868.40 × 7,443.09
  4. Step 4: Simplify right side
    12,221.58x = 125,553,019.36
  5. Step 5: Solve for x
    x = 125,553,019.36/12,221.58
  6. Step 6: Final answer
    x = 10,273.06

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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.