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Finding the Fourth Proportional to 12,404.53, 18,606.80 and 3,639.48

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Solution

The fourth proportional to 12,404.53, 18,606.80 and 3,639.48 is: 5,459.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,404.53 : 18,606.80 = 3,639.48 : x
  2. Step 2: Convert to fraction form
    12,404.53/18,606.80 = 3,639.48/x
  3. Step 3: Cross multiply
    12,404.53x = 18,606.80 × 3,639.48
  4. Step 4: Simplify right side
    12,404.53x = 67,719,076.46
  5. Step 5: Solve for x
    x = 67,719,076.46/12,404.53
  6. Step 6: Final answer
    x = 5,459.22

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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.