Home / 12,621.05-18,919.50-4,721.42

Finding the Fourth Proportional to 12,621.05, 18,919.50 and 4,721.42

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Solution

The fourth proportional to 12,621.05, 18,919.50 and 4,721.42 is: 7,077.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.05 : 18,919.50 = 4,721.42 : x
  2. Step 2: Convert to fraction form
    12,621.05/18,919.50 = 4,721.42/x
  3. Step 3: Cross multiply
    12,621.05x = 18,919.50 × 4,721.42
  4. Step 4: Simplify right side
    12,621.05x = 89,326,811.09
  5. Step 5: Solve for x
    x = 89,326,811.09/12,621.05
  6. Step 6: Final answer
    x = 7,077.61

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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.