Home / 21,429.60-32,119.56-12,671.88

Finding the Fourth Proportional to 21,429.60, 32,119.56 and 12,671.88

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Solution

The fourth proportional to 21,429.60, 32,119.56 and 12,671.88 is: 18,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.60 : 32,119.56 = 12,671.88 : x
  2. Step 2: Convert to fraction form
    21,429.60/32,119.56 = 12,671.88/x
  3. Step 3: Cross multiply
    21,429.60x = 32,119.56 × 12,671.88
  4. Step 4: Simplify right side
    21,429.60x = 407,015,209.97
  5. Step 5: Solve for x
    x = 407,015,209.97/21,429.60
  6. Step 6: Final answer
    x = 18,993.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.