Home / 20,746.20-31,085.10-11,965.80

Finding the Fourth Proportional to 20,746.20, 31,085.10 and 11,965.80

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Solution

The fourth proportional to 20,746.20, 31,085.10 and 11,965.80 is: 17,928.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.20 : 31,085.10 = 11,965.80 : x
  2. Step 2: Convert to fraction form
    20,746.20/31,085.10 = 11,965.80/x
  3. Step 3: Cross multiply
    20,746.20x = 31,085.10 × 11,965.80
  4. Step 4: Simplify right side
    20,746.20x = 371,958,089.58
  5. Step 5: Solve for x
    x = 371,958,089.58/20,746.20
  6. Step 6: Final answer
    x = 17,928.97

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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.