Home / 21,921.14-30,247.33-12,965.38

Finding the Fourth Proportional to 21,921.14, 30,247.33 and 12,965.38

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Solution

The fourth proportional to 21,921.14, 30,247.33 and 12,965.38 is: 17,889.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.14 : 30,247.33 = 12,965.38 : x
  2. Step 2: Convert to fraction form
    21,921.14/30,247.33 = 12,965.38/x
  3. Step 3: Cross multiply
    21,921.14x = 30,247.33 × 12,965.38
  4. Step 4: Simplify right side
    21,921.14x = 392,168,127.44
  5. Step 5: Solve for x
    x = 392,168,127.44/21,921.14
  6. Step 6: Final answer
    x = 17,889.95

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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.