Home / 11,511.08-15,879.30-8,711.72

Finding the Fourth Proportional to 11,511.08, 15,879.30 and 8,711.72

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Solution

The fourth proportional to 11,511.08, 15,879.30 and 8,711.72 is: 12,017.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,511.08 : 15,879.30 = 8,711.72 : x
  2. Step 2: Convert to fraction form
    11,511.08/15,879.30 = 8,711.72/x
  3. Step 3: Cross multiply
    11,511.08x = 15,879.30 × 8,711.72
  4. Step 4: Simplify right side
    11,511.08x = 138,336,015.40
  5. Step 5: Solve for x
    x = 138,336,015.40/11,511.08
  6. Step 6: Final answer
    x = 12,017.64

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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.