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Finding the Fourth Proportional to 21,138.30, 29,111.40 and 17,569.17

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Solution

The fourth proportional to 21,138.30, 29,111.40 and 17,569.17 is: 24,196.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.30 : 29,111.40 = 17,569.17 : x
  2. Step 2: Convert to fraction form
    21,138.30/29,111.40 = 17,569.17/x
  3. Step 3: Cross multiply
    21,138.30x = 29,111.40 × 17,569.17
  4. Step 4: Simplify right side
    21,138.30x = 511,463,135.54
  5. Step 5: Solve for x
    x = 511,463,135.54/21,138.30
  6. Step 6: Final answer
    x = 24,196.04

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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.