Home / 15,220.80-21,003.30-8,505.49

Finding the Fourth Proportional to 15,220.80, 21,003.30 and 8,505.49

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Solution

The fourth proportional to 15,220.80, 21,003.30 and 8,505.49 is: 11,736.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.80 : 21,003.30 = 8,505.49 : x
  2. Step 2: Convert to fraction form
    15,220.80/21,003.30 = 8,505.49/x
  3. Step 3: Cross multiply
    15,220.80x = 21,003.30 × 8,505.49
  4. Step 4: Simplify right side
    15,220.80x = 178,643,358.12
  5. Step 5: Solve for x
    x = 178,643,358.12/15,220.80
  6. Step 6: Final answer
    x = 11,736.79

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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.