Home / 21,220.50-29,286.03-13,682.53

Finding the Fourth Proportional to 21,220.50, 29,286.03 and 13,682.53

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Solution

The fourth proportional to 21,220.50, 29,286.03 and 13,682.53 is: 18,883.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.50 : 29,286.03 = 13,682.53 : x
  2. Step 2: Convert to fraction form
    21,220.50/29,286.03 = 13,682.53/x
  3. Step 3: Cross multiply
    21,220.50x = 29,286.03 × 13,682.53
  4. Step 4: Simplify right side
    21,220.50x = 400,706,907.24
  5. Step 5: Solve for x
    x = 400,706,907.24/21,220.50
  6. Step 6: Final answer
    x = 18,883.01

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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.