Home / 21,921.98-30,245.19-13,415.23

Finding the Fourth Proportional to 21,921.98, 30,245.19 and 13,415.23

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Solution

The fourth proportional to 21,921.98, 30,245.19 and 13,415.23 is: 18,508.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.98 : 30,245.19 = 13,415.23 : x
  2. Step 2: Convert to fraction form
    21,921.98/30,245.19 = 13,415.23/x
  3. Step 3: Cross multiply
    21,921.98x = 30,245.19 × 13,415.23
  4. Step 4: Simplify right side
    21,921.98x = 405,746,029.02
  5. Step 5: Solve for x
    x = 405,746,029.02/21,921.98
  6. Step 6: Final answer
    x = 18,508.64

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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.