Home / 21,381.21-29,486.97-13,424.18

Finding the Fourth Proportional to 21,381.21, 29,486.97 and 13,424.18

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Solution

The fourth proportional to 21,381.21, 29,486.97 and 13,424.18 is: 18,513.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.21 : 29,486.97 = 13,424.18 : x
  2. Step 2: Convert to fraction form
    21,381.21/29,486.97 = 13,424.18/x
  3. Step 3: Cross multiply
    21,381.21x = 29,486.97 × 13,424.18
  4. Step 4: Simplify right side
    21,381.21x = 395,838,245.50
  5. Step 5: Solve for x
    x = 395,838,245.50/21,381.21
  6. Step 6: Final answer
    x = 18,513.37

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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.