Home / 12,189.80-18,270-5,606.96

Finding the Fourth Proportional to 12,189.80, 18,270 and 5,606.96

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Solution

The fourth proportional to 12,189.80, 18,270 and 5,606.96 is: 8,403.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.80 : 18,270 = 5,606.96 : x
  2. Step 2: Convert to fraction form
    12,189.80/18,270 = 5,606.96/x
  3. Step 3: Cross multiply
    12,189.80x = 18,270 × 5,606.96
  4. Step 4: Simplify right side
    12,189.80x = 102,439,159.20
  5. Step 5: Solve for x
    x = 102,439,159.20/12,189.80
  6. Step 6: Final answer
    x = 8,403.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.