Home / 11,621.81-17,431.34-4,221.55

Finding the Fourth Proportional to 11,621.81, 17,431.34 and 4,221.55

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Solution

The fourth proportional to 11,621.81, 17,431.34 and 4,221.55 is: 6,331.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,621.81 : 17,431.34 = 4,221.55 : x
  2. Step 2: Convert to fraction form
    11,621.81/17,431.34 = 4,221.55/x
  3. Step 3: Cross multiply
    11,621.81x = 17,431.34 × 4,221.55
  4. Step 4: Simplify right side
    11,621.81x = 73,587,274.06
  5. Step 5: Solve for x
    x = 73,587,274.06/11,621.81
  6. Step 6: Final answer
    x = 6,331.82

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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.