Home / 21,120.76-31,651.53-16,419.25

Finding the Fourth Proportional to 21,120.76, 31,651.53 and 16,419.25

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Solution

The fourth proportional to 21,120.76, 31,651.53 and 16,419.25 is: 24,605.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.76 : 31,651.53 = 16,419.25 : x
  2. Step 2: Convert to fraction form
    21,120.76/31,651.53 = 16,419.25/x
  3. Step 3: Cross multiply
    21,120.76x = 31,651.53 × 16,419.25
  4. Step 4: Simplify right side
    21,120.76x = 519,694,383.95
  5. Step 5: Solve for x
    x = 519,694,383.95/21,120.76
  6. Step 6: Final answer
    x = 24,605.86

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1.5x scale

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.