Home / 21,163.40-29,139-17,970.04

Finding the Fourth Proportional to 21,163.40, 29,139 and 17,970.04

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Solution

The fourth proportional to 21,163.40, 29,139 and 17,970.04 is: 24,742.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.40 : 29,139 = 17,970.04 : x
  2. Step 2: Convert to fraction form
    21,163.40/29,139 = 17,970.04/x
  3. Step 3: Cross multiply
    21,163.40x = 29,139 × 17,970.04
  4. Step 4: Simplify right side
    21,163.40x = 523,628,995.56
  5. Step 5: Solve for x
    x = 523,628,995.56/21,163.40
  6. Step 6: Final answer
    x = 24,742.20

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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.