Home / 20,954.40-28,908.87-11,997.11

Finding the Fourth Proportional to 20,954.40, 28,908.87 and 11,997.11

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Solution

The fourth proportional to 20,954.40, 28,908.87 and 11,997.11 is: 16,551.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.40 : 28,908.87 = 11,997.11 : x
  2. Step 2: Convert to fraction form
    20,954.40/28,908.87 = 11,997.11/x
  3. Step 3: Cross multiply
    20,954.40x = 28,908.87 × 11,997.11
  4. Step 4: Simplify right side
    20,954.40x = 346,822,748.82
  5. Step 5: Solve for x
    x = 346,822,748.82/20,954.40
  6. Step 6: Final answer
    x = 16,551.31

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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.