Home / 15,787.90-21,791.60-9,074.22

Finding the Fourth Proportional to 15,787.90, 21,791.60 and 9,074.22

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Solution

The fourth proportional to 15,787.90, 21,791.60 and 9,074.22 is: 12,524.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.90 : 21,791.60 = 9,074.22 : x
  2. Step 2: Convert to fraction form
    15,787.90/21,791.60 = 9,074.22/x
  3. Step 3: Cross multiply
    15,787.90x = 21,791.60 × 9,074.22
  4. Step 4: Simplify right side
    15,787.90x = 197,741,772.55
  5. Step 5: Solve for x
    x = 197,741,772.55/15,787.90
  6. Step 6: Final answer
    x = 12,524.89

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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.