Home / 12,621.50-18,932.20-3,856.40

Finding the Fourth Proportional to 12,621.50, 18,932.20 and 3,856.40

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Solution

The fourth proportional to 12,621.50, 18,932.20 and 3,856.40 is: 5,784.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.50 : 18,932.20 = 3,856.40 : x
  2. Step 2: Convert to fraction form
    12,621.50/18,932.20 = 3,856.40/x
  3. Step 3: Cross multiply
    12,621.50x = 18,932.20 × 3,856.40
  4. Step 4: Simplify right side
    12,621.50x = 73,010,136.08
  5. Step 5: Solve for x
    x = 73,010,136.08/12,621.50
  6. Step 6: Final answer
    x = 5,784.58

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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.