Home / 20,374.54-28,116.58-11,422.09

Finding the Fourth Proportional to 20,374.54, 28,116.58 and 11,422.09

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Solution

The fourth proportional to 20,374.54, 28,116.58 and 11,422.09 is: 15,762.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.54 : 28,116.58 = 11,422.09 : x
  2. Step 2: Convert to fraction form
    20,374.54/28,116.58 = 11,422.09/x
  3. Step 3: Cross multiply
    20,374.54x = 28,116.58 × 11,422.09
  4. Step 4: Simplify right side
    20,374.54x = 321,150,107.25
  5. Step 5: Solve for x
    x = 321,150,107.25/20,374.54
  6. Step 6: Final answer
    x = 15,762.32

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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.