Home / 21,028.50-29,019.75-13,589.46

Finding the Fourth Proportional to 21,028.50, 29,019.75 and 13,589.46

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Solution

The fourth proportional to 21,028.50, 29,019.75 and 13,589.46 is: 18,753.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.50 : 29,019.75 = 13,589.46 : x
  2. Step 2: Convert to fraction form
    21,028.50/29,019.75 = 13,589.46/x
  3. Step 3: Cross multiply
    21,028.50x = 29,019.75 × 13,589.46
  4. Step 4: Simplify right side
    21,028.50x = 394,362,731.84
  5. Step 5: Solve for x
    x = 394,362,731.84/21,028.50
  6. Step 6: Final answer
    x = 18,753.73

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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.