Home / 21,231.12-31,846.56-7,380

Finding the Fourth Proportional to 21,231.12, 31,846.56 and 7,380

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Solution

The fourth proportional to 21,231.12, 31,846.56 and 7,380 is: 11,069.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.12 : 31,846.56 = 7,380 : x
  2. Step 2: Convert to fraction form
    21,231.12/31,846.56 = 7,380/x
  3. Step 3: Cross multiply
    21,231.12x = 31,846.56 × 7,380
  4. Step 4: Simplify right side
    21,231.12x = 235,027,612.80
  5. Step 5: Solve for x
    x = 235,027,612.80/21,231.12
  6. Step 6: Final answer
    x = 11,069.96

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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.