Home / 13,491.15-18,620.04-8,189.49

Finding the Fourth Proportional to 13,491.15, 18,620.04 and 8,189.49

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Solution

The fourth proportional to 13,491.15, 18,620.04 and 8,189.49 is: 11,302.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.15 : 18,620.04 = 8,189.49 : x
  2. Step 2: Convert to fraction form
    13,491.15/18,620.04 = 8,189.49/x
  3. Step 3: Cross multiply
    13,491.15x = 18,620.04 × 8,189.49
  4. Step 4: Simplify right side
    13,491.15x = 152,488,631.38
  5. Step 5: Solve for x
    x = 152,488,631.38/13,491.15
  6. Step 6: Final answer
    x = 11,302.86

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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.