Home / 8,085.79-12,128.66-2,539.11

Finding the Fourth Proportional to 8,085.79, 12,128.66 and 2,539.11

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Solution

The fourth proportional to 8,085.79, 12,128.66 and 2,539.11 is: 3,808.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.79 : 12,128.66 = 2,539.11 : x
  2. Step 2: Convert to fraction form
    8,085.79/12,128.66 = 2,539.11/x
  3. Step 3: Cross multiply
    8,085.79x = 12,128.66 × 2,539.11
  4. Step 4: Simplify right side
    8,085.79x = 30,796,001.89
  5. Step 5: Solve for x
    x = 30,796,001.89/8,085.79
  6. Step 6: Final answer
    x = 3,808.66

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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.