Home / 20,494.72-28,283.04-11,420.09

Finding the Fourth Proportional to 20,494.72, 28,283.04 and 11,420.09

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Solution

The fourth proportional to 20,494.72, 28,283.04 and 11,420.09 is: 15,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,494.72 : 28,283.04 = 11,420.09 : x
  2. Step 2: Convert to fraction form
    20,494.72/28,283.04 = 11,420.09/x
  3. Step 3: Cross multiply
    20,494.72x = 28,283.04 × 11,420.09
  4. Step 4: Simplify right side
    20,494.72x = 322,994,932.98
  5. Step 5: Solve for x
    x = 322,994,932.98/20,494.72
  6. Step 6: Final answer
    x = 15,759.91

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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.