Home / 20,120.96-27,772.80-13,416.32

Finding the Fourth Proportional to 20,120.96, 27,772.80 and 13,416.32

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Solution

The fourth proportional to 20,120.96, 27,772.80 and 13,416.32 is: 18,518.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.96 : 27,772.80 = 13,416.32 : x
  2. Step 2: Convert to fraction form
    20,120.96/27,772.80 = 13,416.32/x
  3. Step 3: Cross multiply
    20,120.96x = 27,772.80 × 13,416.32
  4. Step 4: Simplify right side
    20,120.96x = 372,608,772.10
  5. Step 5: Solve for x
    x = 372,608,772.10/20,120.96
  6. Step 6: Final answer
    x = 18,518.44

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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.