Home / 20,917.72-28,866.49-11,486.90

Finding the Fourth Proportional to 20,917.72, 28,866.49 and 11,486.90

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Solution

The fourth proportional to 20,917.72, 28,866.49 and 11,486.90 is: 15,851.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.72 : 28,866.49 = 11,486.90 : x
  2. Step 2: Convert to fraction form
    20,917.72/28,866.49 = 11,486.90/x
  3. Step 3: Cross multiply
    20,917.72x = 28,866.49 × 11,486.90
  4. Step 4: Simplify right side
    20,917.72x = 331,586,483.98
  5. Step 5: Solve for x
    x = 331,586,483.98/20,917.72
  6. Step 6: Final answer
    x = 15,851.94

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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.