Home / 21,619.80-32,381.10-13,163.40

Finding the Fourth Proportional to 21,619.80, 32,381.10 and 13,163.40

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Solution

The fourth proportional to 21,619.80, 32,381.10 and 13,163.40 is: 19,715.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.80 : 32,381.10 = 13,163.40 : x
  2. Step 2: Convert to fraction form
    21,619.80/32,381.10 = 13,163.40/x
  3. Step 3: Cross multiply
    21,619.80x = 32,381.10 × 13,163.40
  4. Step 4: Simplify right side
    21,619.80x = 426,245,371.74
  5. Step 5: Solve for x
    x = 426,245,371.74/21,619.80
  6. Step 6: Final answer
    x = 19,715.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.