Home / 8,085.80-12,129.03-2,821.34

Finding the Fourth Proportional to 8,085.80, 12,129.03 and 2,821.34

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Solution

The fourth proportional to 8,085.80, 12,129.03 and 2,821.34 is: 4,232.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.80 : 12,129.03 = 2,821.34 : x
  2. Step 2: Convert to fraction form
    8,085.80/12,129.03 = 2,821.34/x
  3. Step 3: Cross multiply
    8,085.80x = 12,129.03 × 2,821.34
  4. Step 4: Simplify right side
    8,085.80x = 34,220,056.86
  5. Step 5: Solve for x
    x = 34,220,056.86/8,085.80
  6. Step 6: Final answer
    x = 4,232.12

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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.