Home / 12,189.80-16,822.96-6,885.59

Finding the Fourth Proportional to 12,189.80, 16,822.96 and 6,885.59

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Solution

The fourth proportional to 12,189.80, 16,822.96 and 6,885.59 is: 9,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.80 : 16,822.96 = 6,885.59 : x
  2. Step 2: Convert to fraction form
    12,189.80/16,822.96 = 6,885.59/x
  3. Step 3: Cross multiply
    12,189.80x = 16,822.96 × 6,885.59
  4. Step 4: Simplify right side
    12,189.80x = 115,835,903.82
  5. Step 5: Solve for x
    x = 115,835,903.82/12,189.80
  6. Step 6: Final answer
    x = 9,502.69

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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.