Home / 13,986.73-20,980.16-5,221.56

Finding the Fourth Proportional to 13,986.73, 20,980.16 and 5,221.56

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Solution

The fourth proportional to 13,986.73, 20,980.16 and 5,221.56 is: 7,832.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.73 : 20,980.16 = 5,221.56 : x
  2. Step 2: Convert to fraction form
    13,986.73/20,980.16 = 5,221.56/x
  3. Step 3: Cross multiply
    13,986.73x = 20,980.16 × 5,221.56
  4. Step 4: Simplify right side
    13,986.73x = 109,549,164.25
  5. Step 5: Solve for x
    x = 109,549,164.25/13,986.73
  6. Step 6: Final answer
    x = 7,832.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.