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Finding the Fourth Proportional to 21,336.88, 29,447.88 and 15,388.24

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Solution

The fourth proportional to 21,336.88, 29,447.88 and 15,388.24 is: 21,237.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.88 : 29,447.88 = 15,388.24 : x
  2. Step 2: Convert to fraction form
    21,336.88/29,447.88 = 15,388.24/x
  3. Step 3: Cross multiply
    21,336.88x = 29,447.88 × 15,388.24
  4. Step 4: Simplify right side
    21,336.88x = 453,151,044.93
  5. Step 5: Solve for x
    x = 453,151,044.93/21,336.88
  6. Step 6: Final answer
    x = 21,237.92

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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.