Home / 21,921.03-30,248.79-12,966.78

Finding the Fourth Proportional to 21,921.03, 30,248.79 and 12,966.78

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Solution

The fourth proportional to 21,921.03, 30,248.79 and 12,966.78 is: 17,892.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.03 : 30,248.79 = 12,966.78 : x
  2. Step 2: Convert to fraction form
    21,921.03/30,248.79 = 12,966.78/x
  3. Step 3: Cross multiply
    21,921.03x = 30,248.79 × 12,966.78
  4. Step 4: Simplify right side
    21,921.03x = 392,229,542.94
  5. Step 5: Solve for x
    x = 392,229,542.94/21,921.03
  6. Step 6: Final answer
    x = 17,892.84

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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.