Home / 8,085.90-12,129.36-2,539.47

Finding the Fourth Proportional to 8,085.90, 12,129.36 and 2,539.47

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Solution

The fourth proportional to 8,085.90, 12,129.36 and 2,539.47 is: 3,809.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.90 : 12,129.36 = 2,539.47 : x
  2. Step 2: Convert to fraction form
    8,085.90/12,129.36 = 2,539.47/x
  3. Step 3: Cross multiply
    8,085.90x = 12,129.36 × 2,539.47
  4. Step 4: Simplify right side
    8,085.90x = 30,802,145.84
  5. Step 5: Solve for x
    x = 30,802,145.84/8,085.90
  6. Step 6: Final answer
    x = 3,809.37

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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.