Home / 20,948.68-28,911.46-11,999.12

Finding the Fourth Proportional to 20,948.68, 28,911.46 and 11,999.12

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Solution

The fourth proportional to 20,948.68, 28,911.46 and 11,999.12 is: 16,560.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.68 : 28,911.46 = 11,999.12 : x
  2. Step 2: Convert to fraction form
    20,948.68/28,911.46 = 11,999.12/x
  3. Step 3: Cross multiply
    20,948.68x = 28,911.46 × 11,999.12
  4. Step 4: Simplify right side
    20,948.68x = 346,912,077.92
  5. Step 5: Solve for x
    x = 346,912,077.92/20,948.68
  6. Step 6: Final answer
    x = 16,560.09

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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.