Home / 20,961.54-28,927-11,530.12

Finding the Fourth Proportional to 20,961.54, 28,927 and 11,530.12

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Solution

The fourth proportional to 20,961.54, 28,927 and 11,530.12 is: 15,911.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.54 : 28,927 = 11,530.12 : x
  2. Step 2: Convert to fraction form
    20,961.54/28,927 = 11,530.12/x
  3. Step 3: Cross multiply
    20,961.54x = 28,927 × 11,530.12
  4. Step 4: Simplify right side
    20,961.54x = 333,531,781.24
  5. Step 5: Solve for x
    x = 333,531,781.24/20,961.54
  6. Step 6: Final answer
    x = 15,911.61

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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.