Home / 13,188.11-18,199.77-9,417.65

Finding the Fourth Proportional to 13,188.11, 18,199.77 and 9,417.65

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Solution

The fourth proportional to 13,188.11, 18,199.77 and 9,417.65 is: 12,996.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.11 : 18,199.77 = 9,417.65 : x
  2. Step 2: Convert to fraction form
    13,188.11/18,199.77 = 9,417.65/x
  3. Step 3: Cross multiply
    13,188.11x = 18,199.77 × 9,417.65
  4. Step 4: Simplify right side
    13,188.11x = 171,399,063.94
  5. Step 5: Solve for x
    x = 171,399,063.94/13,188.11
  6. Step 6: Final answer
    x = 12,996.48

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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.