Home / 21,753.26-29,990.94-15,698.42

Finding the Fourth Proportional to 21,753.26, 29,990.94 and 15,698.42

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Solution

The fourth proportional to 21,753.26, 29,990.94 and 15,698.42 is: 21,643.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.26 : 29,990.94 = 15,698.42 : x
  2. Step 2: Convert to fraction form
    21,753.26/29,990.94 = 15,698.42/x
  3. Step 3: Cross multiply
    21,753.26x = 29,990.94 × 15,698.42
  4. Step 4: Simplify right side
    21,753.26x = 470,810,372.31
  5. Step 5: Solve for x
    x = 470,810,372.31/21,753.26
  6. Step 6: Final answer
    x = 21,643.21

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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.