Home / 21,792.24-32,685.12-7,938

Finding the Fourth Proportional to 21,792.24, 32,685.12 and 7,938

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Solution

The fourth proportional to 21,792.24, 32,685.12 and 7,938 is: 11,905.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,792.24 : 32,685.12 = 7,938 : x
  2. Step 2: Convert to fraction form
    21,792.24/32,685.12 = 7,938/x
  3. Step 3: Cross multiply
    21,792.24x = 32,685.12 × 7,938
  4. Step 4: Simplify right side
    21,792.24x = 259,454,482.56
  5. Step 5: Solve for x
    x = 259,454,482.56/21,792.24
  6. Step 6: Final answer
    x = 11,905.82

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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.