Home / 21,140.08-29,172.24-11,579.84

Finding the Fourth Proportional to 21,140.08, 29,172.24 and 11,579.84

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Solution

The fourth proportional to 21,140.08, 29,172.24 and 11,579.84 is: 15,979.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.08 : 29,172.24 = 11,579.84 : x
  2. Step 2: Convert to fraction form
    21,140.08/29,172.24 = 11,579.84/x
  3. Step 3: Cross multiply
    21,140.08x = 29,172.24 × 11,579.84
  4. Step 4: Simplify right side
    21,140.08x = 337,809,871.64
  5. Step 5: Solve for x
    x = 337,809,871.64/21,140.08
  6. Step 6: Final answer
    x = 15,979.59

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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.