Home / 21,129.51-29,157.82-11,569.22

Finding the Fourth Proportional to 21,129.51, 29,157.82 and 11,569.22

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Solution

The fourth proportional to 21,129.51, 29,157.82 and 11,569.22 is: 15,965.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.51 : 29,157.82 = 11,569.22 : x
  2. Step 2: Convert to fraction form
    21,129.51/29,157.82 = 11,569.22/x
  3. Step 3: Cross multiply
    21,129.51x = 29,157.82 × 11,569.22
  4. Step 4: Simplify right side
    21,129.51x = 337,333,132.48
  5. Step 5: Solve for x
    x = 337,333,132.48/21,129.51
  6. Step 6: Final answer
    x = 15,965.03

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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.