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Finding the Fourth Proportional to 28,563.81, 39,396.81 and 18,484.47

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Solution

The fourth proportional to 28,563.81, 39,396.81 and 18,484.47 is: 25,494.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,563.81 : 39,396.81 = 18,484.47 : x
  2. Step 2: Convert to fraction form
    28,563.81/39,396.81 = 18,484.47/x
  3. Step 3: Cross multiply
    28,563.81x = 39,396.81 × 18,484.47
  4. Step 4: Simplify right side
    28,563.81x = 728,229,198.75
  5. Step 5: Solve for x
    x = 728,229,198.75/28,563.81
  6. Step 6: Final answer
    x = 25,494.82

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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.