Home / 13,564.11-18,719.45-8,187.85

Finding the Fourth Proportional to 13,564.11, 18,719.45 and 8,187.85

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Solution

The fourth proportional to 13,564.11, 18,719.45 and 8,187.85 is: 11,299.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,564.11 : 18,719.45 = 8,187.85 : x
  2. Step 2: Convert to fraction form
    13,564.11/18,719.45 = 8,187.85/x
  3. Step 3: Cross multiply
    13,564.11x = 18,719.45 × 8,187.85
  4. Step 4: Simplify right side
    13,564.11x = 153,272,048.68
  5. Step 5: Solve for x
    x = 153,272,048.68/13,564.11
  6. Step 6: Final answer
    x = 11,299.82

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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.