Home / 8,085.84-12,128.91-2,539.05

Finding the Fourth Proportional to 8,085.84, 12,128.91 and 2,539.05

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Solution

The fourth proportional to 8,085.84, 12,128.91 and 2,539.05 is: 3,808.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.84 : 12,128.91 = 2,539.05 : x
  2. Step 2: Convert to fraction form
    8,085.84/12,128.91 = 2,539.05/x
  3. Step 3: Cross multiply
    8,085.84x = 12,128.91 × 2,539.05
  4. Step 4: Simplify right side
    8,085.84x = 30,795,908.94
  5. Step 5: Solve for x
    x = 30,795,908.94/8,085.84
  6. Step 6: Final answer
    x = 3,808.62

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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.