Home / 20,367.88-28,108.14-11,415.64

Finding the Fourth Proportional to 20,367.88, 28,108.14 and 11,415.64

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Solution

The fourth proportional to 20,367.88, 28,108.14 and 11,415.64 is: 15,753.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,367.88 : 28,108.14 = 11,415.64 : x
  2. Step 2: Convert to fraction form
    20,367.88/28,108.14 = 11,415.64/x
  3. Step 3: Cross multiply
    20,367.88x = 28,108.14 × 11,415.64
  4. Step 4: Simplify right side
    20,367.88x = 320,872,407.31
  5. Step 5: Solve for x
    x = 320,872,407.31/20,367.88
  6. Step 6: Final answer
    x = 15,753.84

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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.