Home / 21,140.13-29,173.68-11,579.80

Finding the Fourth Proportional to 21,140.13, 29,173.68 and 11,579.80

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Solution

The fourth proportional to 21,140.13, 29,173.68 and 11,579.80 is: 15,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.13 : 29,173.68 = 11,579.80 : x
  2. Step 2: Convert to fraction form
    21,140.13/29,173.68 = 11,579.80/x
  3. Step 3: Cross multiply
    21,140.13x = 29,173.68 × 11,579.80
  4. Step 4: Simplify right side
    21,140.13x = 337,825,379.66
  5. Step 5: Solve for x
    x = 337,825,379.66/21,140.13
  6. Step 6: Final answer
    x = 15,980.29

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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.