Home / 20,778.31-28,673.63-11,346.91

Finding the Fourth Proportional to 20,778.31, 28,673.63 and 11,346.91

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Solution

The fourth proportional to 20,778.31, 28,673.63 and 11,346.91 is: 15,658.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.31 : 28,673.63 = 11,346.91 : x
  2. Step 2: Convert to fraction form
    20,778.31/28,673.63 = 11,346.91/x
  3. Step 3: Cross multiply
    20,778.31x = 28,673.63 × 11,346.91
  4. Step 4: Simplify right side
    20,778.31x = 325,357,042.25
  5. Step 5: Solve for x
    x = 325,357,042.25/20,778.31
  6. Step 6: Final answer
    x = 15,658.49

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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.