Home / 11,529.57-15,911.58-8,691.95

Finding the Fourth Proportional to 11,529.57, 15,911.58 and 8,691.95

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Solution

The fourth proportional to 11,529.57, 15,911.58 and 8,691.95 is: 11,995.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,529.57 : 15,911.58 = 8,691.95 : x
  2. Step 2: Convert to fraction form
    11,529.57/15,911.58 = 8,691.95/x
  3. Step 3: Cross multiply
    11,529.57x = 15,911.58 × 8,691.95
  4. Step 4: Simplify right side
    11,529.57x = 138,302,578.22
  5. Step 5: Solve for x
    x = 138,302,578.22/11,529.57
  6. Step 6: Final answer
    x = 11,995.47

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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.