Home / 21,191.91-31,787.09-6,400.45

Finding the Fourth Proportional to 21,191.91, 31,787.09 and 6,400.45

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Solution

The fourth proportional to 21,191.91, 31,787.09 and 6,400.45 is: 9,600.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.91 : 31,787.09 = 6,400.45 : x
  2. Step 2: Convert to fraction form
    21,191.91/31,787.09 = 6,400.45/x
  3. Step 3: Cross multiply
    21,191.91x = 31,787.09 × 6,400.45
  4. Step 4: Simplify right side
    21,191.91x = 203,451,616.72
  5. Step 5: Solve for x
    x = 203,451,616.72/21,191.91
  6. Step 6: Final answer
    x = 9,600.44

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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.