Home / 13,291.29-18,336.11-8,815.77

Finding the Fourth Proportional to 13,291.29, 18,336.11 and 8,815.77

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Solution

The fourth proportional to 13,291.29, 18,336.11 and 8,815.77 is: 12,161.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.29 : 18,336.11 = 8,815.77 : x
  2. Step 2: Convert to fraction form
    13,291.29/18,336.11 = 8,815.77/x
  3. Step 3: Cross multiply
    13,291.29x = 18,336.11 × 8,815.77
  4. Step 4: Simplify right side
    13,291.29x = 161,646,884.38
  5. Step 5: Solve for x
    x = 161,646,884.38/13,291.29
  6. Step 6: Final answer
    x = 12,161.87

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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.