Home / 20,881.56-28,816.80-11,449.92

Finding the Fourth Proportional to 20,881.56, 28,816.80 and 11,449.92

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Solution

The fourth proportional to 20,881.56, 28,816.80 and 11,449.92 is: 15,801.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.56 : 28,816.80 = 11,449.92 : x
  2. Step 2: Convert to fraction form
    20,881.56/28,816.80 = 11,449.92/x
  3. Step 3: Cross multiply
    20,881.56x = 28,816.80 × 11,449.92
  4. Step 4: Simplify right side
    20,881.56x = 329,950,054.66
  5. Step 5: Solve for x
    x = 329,950,054.66/20,881.56
  6. Step 6: Final answer
    x = 15,801.03

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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.