Home / 21,143.89-29,165.29-13,600.02

Finding the Fourth Proportional to 21,143.89, 29,165.29 and 13,600.02

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Solution

The fourth proportional to 21,143.89, 29,165.29 and 13,600.02 is: 18,759.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.89 : 29,165.29 = 13,600.02 : x
  2. Step 2: Convert to fraction form
    21,143.89/29,165.29 = 13,600.02/x
  3. Step 3: Cross multiply
    21,143.89x = 29,165.29 × 13,600.02
  4. Step 4: Simplify right side
    21,143.89x = 396,648,493.31
  5. Step 5: Solve for x
    x = 396,648,493.31/21,143.89
  6. Step 6: Final answer
    x = 18,759.49

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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.