Home / 20,801.55-28,705.97-11,370.09

Finding the Fourth Proportional to 20,801.55, 28,705.97 and 11,370.09

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Solution

The fourth proportional to 20,801.55, 28,705.97 and 11,370.09 is: 15,690.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.55 : 28,705.97 = 11,370.09 : x
  2. Step 2: Convert to fraction form
    20,801.55/28,705.97 = 11,370.09/x
  3. Step 3: Cross multiply
    20,801.55x = 28,705.97 × 11,370.09
  4. Step 4: Simplify right side
    20,801.55x = 326,389,405.59
  5. Step 5: Solve for x
    x = 326,389,405.59/20,801.55
  6. Step 6: Final answer
    x = 15,690.63

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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.