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Finding the Fourth Proportional to 21,642.54, 29,867.08 and 12,696.48

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Solution

The fourth proportional to 21,642.54, 29,867.08 and 12,696.48 is: 17,521.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,642.54 : 29,867.08 = 12,696.48 : x
  2. Step 2: Convert to fraction form
    21,642.54/29,867.08 = 12,696.48/x
  3. Step 3: Cross multiply
    21,642.54x = 29,867.08 × 12,696.48
  4. Step 4: Simplify right side
    21,642.54x = 379,206,783.88
  5. Step 5: Solve for x
    x = 379,206,783.88/21,642.54
  6. Step 6: Final answer
    x = 17,521.36

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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.