Home / 20,659.56-28,509.40-11,227.80

Finding the Fourth Proportional to 20,659.56, 28,509.40 and 11,227.80

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Solution

The fourth proportional to 20,659.56, 28,509.40 and 11,227.80 is: 15,493.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.56 : 28,509.40 = 11,227.80 : x
  2. Step 2: Convert to fraction form
    20,659.56/28,509.40 = 11,227.80/x
  3. Step 3: Cross multiply
    20,659.56x = 28,509.40 × 11,227.80
  4. Step 4: Simplify right side
    20,659.56x = 320,097,841.32
  5. Step 5: Solve for x
    x = 320,097,841.32/20,659.56
  6. Step 6: Final answer
    x = 15,493.93

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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.