Home / 20,867.50-28,797.18-11,435.86

Finding the Fourth Proportional to 20,867.50, 28,797.18 and 11,435.86

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Solution

The fourth proportional to 20,867.50, 28,797.18 and 11,435.86 is: 15,781.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.50 : 28,797.18 = 11,435.86 : x
  2. Step 2: Convert to fraction form
    20,867.50/28,797.18 = 11,435.86/x
  3. Step 3: Cross multiply
    20,867.50x = 28,797.18 × 11,435.86
  4. Step 4: Simplify right side
    20,867.50x = 329,320,518.87
  5. Step 5: Solve for x
    x = 329,320,518.87/20,867.50
  6. Step 6: Final answer
    x = 15,781.50

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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.