Home / 21,285.36-29,372.04-11,853

Finding the Fourth Proportional to 21,285.36, 29,372.04 and 11,853

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Solution

The fourth proportional to 21,285.36, 29,372.04 and 11,853 is: 16,356.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.36 : 29,372.04 = 11,853 : x
  2. Step 2: Convert to fraction form
    21,285.36/29,372.04 = 11,853/x
  3. Step 3: Cross multiply
    21,285.36x = 29,372.04 × 11,853
  4. Step 4: Simplify right side
    21,285.36x = 348,146,790.12
  5. Step 5: Solve for x
    x = 348,146,790.12/21,285.36
  6. Step 6: Final answer
    x = 16,356.16

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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.