Home / 20,621.39-28,480.83-13,895.34

Finding the Fourth Proportional to 20,621.39, 28,480.83 and 13,895.34

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Solution

The fourth proportional to 20,621.39, 28,480.83 and 13,895.34 is: 19,191.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.39 : 28,480.83 = 13,895.34 : x
  2. Step 2: Convert to fraction form
    20,621.39/28,480.83 = 13,895.34/x
  3. Step 3: Cross multiply
    20,621.39x = 28,480.83 × 13,895.34
  4. Step 4: Simplify right side
    20,621.39x = 395,750,816.33
  5. Step 5: Solve for x
    x = 395,750,816.33/20,621.39
  6. Step 6: Final answer
    x = 19,191.28

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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.