Home / 21,150.63-29,160.21-18,198.18

Finding the Fourth Proportional to 21,150.63, 29,160.21 and 18,198.18

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Solution

The fourth proportional to 21,150.63, 29,160.21 and 18,198.18 is: 25,089.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.63 : 29,160.21 = 18,198.18 : x
  2. Step 2: Convert to fraction form
    21,150.63/29,160.21 = 18,198.18/x
  3. Step 3: Cross multiply
    21,150.63x = 29,160.21 × 18,198.18
  4. Step 4: Simplify right side
    21,150.63x = 530,662,750.42
  5. Step 5: Solve for x
    x = 530,662,750.42/21,150.63
  6. Step 6: Final answer
    x = 25,089.69

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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.