Home / 20,867.58-28,788.21-13,803.84

Finding the Fourth Proportional to 20,867.58, 28,788.21 and 13,803.84

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Solution

The fourth proportional to 20,867.58, 28,788.21 and 13,803.84 is: 19,043.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.58 : 28,788.21 = 13,803.84 : x
  2. Step 2: Convert to fraction form
    20,867.58/28,788.21 = 13,803.84/x
  3. Step 3: Cross multiply
    20,867.58x = 28,788.21 × 13,803.84
  4. Step 4: Simplify right side
    20,867.58x = 397,387,844.73
  5. Step 5: Solve for x
    x = 397,387,844.73/20,867.58
  6. Step 6: Final answer
    x = 19,043.31

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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.