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Finding the Fourth Proportional to 21,972.79, 32,960.73 and 8,825.16

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Solution

The fourth proportional to 21,972.79, 32,960.73 and 8,825.16 is: 13,238.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.79 : 32,960.73 = 8,825.16 : x
  2. Step 2: Convert to fraction form
    21,972.79/32,960.73 = 8,825.16/x
  3. Step 3: Cross multiply
    21,972.79x = 32,960.73 × 8,825.16
  4. Step 4: Simplify right side
    21,972.79x = 290,883,715.97
  5. Step 5: Solve for x
    x = 290,883,715.97/21,972.79
  6. Step 6: Final answer
    x = 13,238.36

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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.