Home / 20,867.13-28,797.36-11,435.70

Finding the Fourth Proportional to 20,867.13, 28,797.36 and 11,435.70

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Solution

The fourth proportional to 20,867.13, 28,797.36 and 11,435.70 is: 15,781.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.13 : 28,797.36 = 11,435.70 : x
  2. Step 2: Convert to fraction form
    20,867.13/28,797.36 = 11,435.70/x
  3. Step 3: Cross multiply
    20,867.13x = 28,797.36 × 11,435.70
  4. Step 4: Simplify right side
    20,867.13x = 329,317,969.75
  5. Step 5: Solve for x
    x = 329,317,969.75/20,867.13
  6. Step 6: Final answer
    x = 15,781.66

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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.