Home / 21,172.88-29,145.24-18,300.30

Finding the Fourth Proportional to 21,172.88, 29,145.24 and 18,300.30

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Solution

The fourth proportional to 21,172.88, 29,145.24 and 18,300.30 is: 25,191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.88 : 29,145.24 = 18,300.30 : x
  2. Step 2: Convert to fraction form
    21,172.88/29,145.24 = 18,300.30/x
  3. Step 3: Cross multiply
    21,172.88x = 29,145.24 × 18,300.30
  4. Step 4: Simplify right side
    21,172.88x = 533,366,635.57
  5. Step 5: Solve for x
    x = 533,366,635.57/21,172.88
  6. Step 6: Final answer
    x = 25,191.03

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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.