Home / 12,189.36-16,821.36-6,600.36

Finding the Fourth Proportional to 12,189.36, 16,821.36 and 6,600.36

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Solution

The fourth proportional to 12,189.36, 16,821.36 and 6,600.36 is: 9,108.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.36 : 16,821.36 = 6,600.36 : x
  2. Step 2: Convert to fraction form
    12,189.36/16,821.36 = 6,600.36/x
  3. Step 3: Cross multiply
    12,189.36x = 16,821.36 × 6,600.36
  4. Step 4: Simplify right side
    12,189.36x = 111,027,031.69
  5. Step 5: Solve for x
    x = 111,027,031.69/12,189.36
  6. Step 6: Final answer
    x = 9,108.52

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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.