Home / 20,221.14-27,922.35-12,680.10

Finding the Fourth Proportional to 20,221.14, 27,922.35 and 12,680.10

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Solution

The fourth proportional to 20,221.14, 27,922.35 and 12,680.10 is: 17,509.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.14 : 27,922.35 = 12,680.10 : x
  2. Step 2: Convert to fraction form
    20,221.14/27,922.35 = 12,680.10/x
  3. Step 3: Cross multiply
    20,221.14x = 27,922.35 × 12,680.10
  4. Step 4: Simplify right side
    20,221.14x = 354,058,190.24
  5. Step 5: Solve for x
    x = 354,058,190.24/20,221.14
  6. Step 6: Final answer
    x = 17,509.31

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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.