Home / 21,743.71-30,002.20-20,636.44

Finding the Fourth Proportional to 21,743.71, 30,002.20 and 20,636.44

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Solution

The fourth proportional to 21,743.71, 30,002.20 and 20,636.44 is: 28,474.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,743.71 : 30,002.20 = 20,636.44 : x
  2. Step 2: Convert to fraction form
    21,743.71/30,002.20 = 20,636.44/x
  3. Step 3: Cross multiply
    21,743.71x = 30,002.20 × 20,636.44
  4. Step 4: Simplify right side
    21,743.71x = 619,138,600.17
  5. Step 5: Solve for x
    x = 619,138,600.17/21,743.71
  6. Step 6: Final answer
    x = 28,474.38

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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.