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Finding the Fourth Proportional to 21,396.53, 29,528.01 and 11,965.07

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Solution

The fourth proportional to 21,396.53, 29,528.01 and 11,965.07 is: 16,512.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396.53 : 29,528.01 = 11,965.07 : x
  2. Step 2: Convert to fraction form
    21,396.53/29,528.01 = 11,965.07/x
  3. Step 3: Cross multiply
    21,396.53x = 29,528.01 × 11,965.07
  4. Step 4: Simplify right side
    21,396.53x = 353,304,706.61
  5. Step 5: Solve for x
    x = 353,304,706.61/21,396.53
  6. Step 6: Final answer
    x = 16,512.24

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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.