Home / 20,264.97-30,359.49-11,920.05

Finding the Fourth Proportional to 20,264.97, 30,359.49 and 11,920.05

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Solution

The fourth proportional to 20,264.97, 30,359.49 and 11,920.05 is: 17,857.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,264.97 : 30,359.49 = 11,920.05 : x
  2. Step 2: Convert to fraction form
    20,264.97/30,359.49 = 11,920.05/x
  3. Step 3: Cross multiply
    20,264.97x = 30,359.49 × 11,920.05
  4. Step 4: Simplify right side
    20,264.97x = 361,886,638.77
  5. Step 5: Solve for x
    x = 361,886,638.77/20,264.97
  6. Step 6: Final answer
    x = 17,857.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.