Home / 21,114-29,138.40-12,731.04

Finding the Fourth Proportional to 21,114, 29,138.40 and 12,731.04

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Solution

The fourth proportional to 21,114, 29,138.40 and 12,731.04 is: 17,569.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114 : 29,138.40 = 12,731.04 : x
  2. Step 2: Convert to fraction form
    21,114/29,138.40 = 12,731.04/x
  3. Step 3: Cross multiply
    21,114x = 29,138.40 × 12,731.04
  4. Step 4: Simplify right side
    21,114x = 370,962,135.94
  5. Step 5: Solve for x
    x = 370,962,135.94/21,114
  6. Step 6: Final answer
    x = 17,569.49

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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.