Home / 20,511.15-28,305.98-11,558.16

Finding the Fourth Proportional to 20,511.15, 28,305.98 and 11,558.16

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Solution

The fourth proportional to 20,511.15, 28,305.98 and 11,558.16 is: 15,950.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.15 : 28,305.98 = 11,558.16 : x
  2. Step 2: Convert to fraction form
    20,511.15/28,305.98 = 11,558.16/x
  3. Step 3: Cross multiply
    20,511.15x = 28,305.98 × 11,558.16
  4. Step 4: Simplify right side
    20,511.15x = 327,165,045.80
  5. Step 5: Solve for x
    x = 327,165,045.80/20,511.15
  6. Step 6: Final answer
    x = 15,950.59

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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.