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Finding the Fourth Proportional to 21,393.72, 29,526.12 and 11,964.24

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Solution

The fourth proportional to 21,393.72, 29,526.12 and 11,964.24 is: 16,512.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,393.72 : 29,526.12 = 11,964.24 : x
  2. Step 2: Convert to fraction form
    21,393.72/29,526.12 = 11,964.24/x
  3. Step 3: Cross multiply
    21,393.72x = 29,526.12 × 11,964.24
  4. Step 4: Simplify right side
    21,393.72x = 353,257,585.95
  5. Step 5: Solve for x
    x = 353,257,585.95/21,393.72
  6. Step 6: Final answer
    x = 16,512.21

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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.