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Finding the Fourth Proportional to 22,457.81, 30,993.87 and 12,899.03

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Solution

The fourth proportional to 22,457.81, 30,993.87 and 12,899.03 is: 17,801.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,457.81 : 30,993.87 = 12,899.03 : x
  2. Step 2: Convert to fraction form
    22,457.81/30,993.87 = 12,899.03/x
  3. Step 3: Cross multiply
    22,457.81x = 30,993.87 × 12,899.03
  4. Step 4: Simplify right side
    22,457.81x = 399,790,858.95
  5. Step 5: Solve for x
    x = 399,790,858.95/22,457.81
  6. Step 6: Final answer
    x = 17,801.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.