Home / 21,385.46-29,481.90-13,422.36

Finding the Fourth Proportional to 21,385.46, 29,481.90 and 13,422.36

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Solution

The fourth proportional to 21,385.46, 29,481.90 and 13,422.36 is: 18,504.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.46 : 29,481.90 = 13,422.36 : x
  2. Step 2: Convert to fraction form
    21,385.46/29,481.90 = 13,422.36/x
  3. Step 3: Cross multiply
    21,385.46x = 29,481.90 × 13,422.36
  4. Step 4: Simplify right side
    21,385.46x = 395,716,675.28
  5. Step 5: Solve for x
    x = 395,716,675.28/21,385.46
  6. Step 6: Final answer
    x = 18,504.01

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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.