Home / 8,079.40-12,120.74-2,885.14

Finding the Fourth Proportional to 8,079.40, 12,120.74 and 2,885.14

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Solution

The fourth proportional to 8,079.40, 12,120.74 and 2,885.14 is: 4,328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.40 : 12,120.74 = 2,885.14 : x
  2. Step 2: Convert to fraction form
    8,079.40/12,120.74 = 2,885.14/x
  3. Step 3: Cross multiply
    8,079.40x = 12,120.74 × 2,885.14
  4. Step 4: Simplify right side
    8,079.40x = 34,970,031.80
  5. Step 5: Solve for x
    x = 34,970,031.80/8,079.40
  6. Step 6: Final answer
    x = 4,328.30

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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.