Home / 20,778.40-28,674.42-11,347.24

Finding the Fourth Proportional to 20,778.40, 28,674.42 and 11,347.24

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Solution

The fourth proportional to 20,778.40, 28,674.42 and 11,347.24 is: 15,659.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.40 : 28,674.42 = 11,347.24 : x
  2. Step 2: Convert to fraction form
    20,778.40/28,674.42 = 11,347.24/x
  3. Step 3: Cross multiply
    20,778.40x = 28,674.42 × 11,347.24
  4. Step 4: Simplify right side
    20,778.40x = 325,375,525.60
  5. Step 5: Solve for x
    x = 325,375,525.60/20,778.40
  6. Step 6: Final answer
    x = 15,659.32

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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.