Home / 20,778.56-28,673.36-11,345.36

Finding the Fourth Proportional to 20,778.56, 28,673.36 and 11,345.36

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Solution

The fourth proportional to 20,778.56, 28,673.36 and 11,345.36 is: 15,656.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.56 : 28,673.36 = 11,345.36 : x
  2. Step 2: Convert to fraction form
    20,778.56/28,673.36 = 11,345.36/x
  3. Step 3: Cross multiply
    20,778.56x = 28,673.36 × 11,345.36
  4. Step 4: Simplify right side
    20,778.56x = 325,309,591.61
  5. Step 5: Solve for x
    x = 325,309,591.61/20,778.56
  6. Step 6: Final answer
    x = 15,656.02

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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.