Home / 20,917.16-28,865.72-11,486.32

Finding the Fourth Proportional to 20,917.16, 28,865.72 and 11,486.32

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Solution

The fourth proportional to 20,917.16, 28,865.72 and 11,486.32 is: 15,851.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.16 : 28,865.72 = 11,486.32 : x
  2. Step 2: Convert to fraction form
    20,917.16/28,865.72 = 11,486.32/x
  3. Step 3: Cross multiply
    20,917.16x = 28,865.72 × 11,486.32
  4. Step 4: Simplify right side
    20,917.16x = 331,560,896.95
  5. Step 5: Solve for x
    x = 331,560,896.95/20,917.16
  6. Step 6: Final answer
    x = 15,851.14

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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.