Home / 20,997.95-28,977.17-11,566.51

Finding the Fourth Proportional to 20,997.95, 28,977.17 and 11,566.51

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Solution

The fourth proportional to 20,997.95, 28,977.17 and 11,566.51 is: 15,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.95 : 28,977.17 = 11,566.51 : x
  2. Step 2: Convert to fraction form
    20,997.95/28,977.17 = 11,566.51/x
  3. Step 3: Cross multiply
    20,997.95x = 28,977.17 × 11,566.51
  4. Step 4: Simplify right side
    20,997.95x = 335,164,668.74
  5. Step 5: Solve for x
    x = 335,164,668.74/20,997.95
  6. Step 6: Final answer
    x = 15,961.78

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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.