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Finding the Fourth Proportional to 18,122.81, 27,186.71 and 5,643.72

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Solution

The fourth proportional to 18,122.81, 27,186.71 and 5,643.72 is: 8,466.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,122.81 : 27,186.71 = 5,643.72 : x
  2. Step 2: Convert to fraction form
    18,122.81/27,186.71 = 5,643.72/x
  3. Step 3: Cross multiply
    18,122.81x = 27,186.71 × 5,643.72
  4. Step 4: Simplify right side
    18,122.81x = 153,434,150.74
  5. Step 5: Solve for x
    x = 153,434,150.74/18,122.81
  6. Step 6: Final answer
    x = 8,466.36

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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.