Home / 12,639.12-18,959.52-3,874.08

Finding the Fourth Proportional to 12,639.12, 18,959.52 and 3,874.08

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Solution

The fourth proportional to 12,639.12, 18,959.52 and 3,874.08 is: 5,811.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.12 : 18,959.52 = 3,874.08 : x
  2. Step 2: Convert to fraction form
    12,639.12/18,959.52 = 3,874.08/x
  3. Step 3: Cross multiply
    12,639.12x = 18,959.52 × 3,874.08
  4. Step 4: Simplify right side
    12,639.12x = 73,450,697.24
  5. Step 5: Solve for x
    x = 73,450,697.24/12,639.12
  6. Step 6: Final answer
    x = 5,811.38

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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.