Home / 20,811.01-28,719.71-11,380.27

Finding the Fourth Proportional to 20,811.01, 28,719.71 and 11,380.27

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Solution

The fourth proportional to 20,811.01, 28,719.71 and 11,380.27 is: 15,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.01 : 28,719.71 = 11,380.27 : x
  2. Step 2: Convert to fraction form
    20,811.01/28,719.71 = 11,380.27/x
  3. Step 3: Cross multiply
    20,811.01x = 28,719.71 × 11,380.27
  4. Step 4: Simplify right side
    20,811.01x = 326,838,054.12
  5. Step 5: Solve for x
    x = 326,838,054.12/20,811.01
  6. Step 6: Final answer
    x = 15,705.05

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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.