Home / 12,621.40-18,932.10-3,856.30

Finding the Fourth Proportional to 12,621.40, 18,932.10 and 3,856.30

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Solution

The fourth proportional to 12,621.40, 18,932.10 and 3,856.30 is: 5,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.40 : 18,932.10 = 3,856.30 : x
  2. Step 2: Convert to fraction form
    12,621.40/18,932.10 = 3,856.30/x
  3. Step 3: Cross multiply
    12,621.40x = 18,932.10 × 3,856.30
  4. Step 4: Simplify right side
    12,621.40x = 73,007,857.23
  5. Step 5: Solve for x
    x = 73,007,857.23/12,621.40
  6. Step 6: Final answer
    x = 5,784.45

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Similar ratio
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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.