Home / 8,185.16-12,279.45-2,639.07

Finding the Fourth Proportional to 8,185.16, 12,279.45 and 2,639.07

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Solution

The fourth proportional to 8,185.16, 12,279.45 and 2,639.07 is: 3,959.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.16 : 12,279.45 = 2,639.07 : x
  2. Step 2: Convert to fraction form
    8,185.16/12,279.45 = 2,639.07/x
  3. Step 3: Cross multiply
    8,185.16x = 12,279.45 × 2,639.07
  4. Step 4: Simplify right side
    8,185.16x = 32,406,328.11
  5. Step 5: Solve for x
    x = 32,406,328.11/8,185.16
  6. Step 6: Final answer
    x = 3,959.16

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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.