Home / 20,565.75-28,380.75-11,134.32

Finding the Fourth Proportional to 20,565.75, 28,380.75 and 11,134.32

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Solution

The fourth proportional to 20,565.75, 28,380.75 and 11,134.32 is: 15,365.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.75 : 28,380.75 = 11,134.32 : x
  2. Step 2: Convert to fraction form
    20,565.75/28,380.75 = 11,134.32/x
  3. Step 3: Cross multiply
    20,565.75x = 28,380.75 × 11,134.32
  4. Step 4: Simplify right side
    20,565.75x = 316,000,352.34
  5. Step 5: Solve for x
    x = 316,000,352.34/20,565.75
  6. Step 6: Final answer
    x = 15,365.37

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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.