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Finding the Fourth Proportional to 28,802.72, 39,743.52 and 16,861.52

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Solution

The fourth proportional to 28,802.72, 39,743.52 and 16,861.52 is: 23,266.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,802.72 : 39,743.52 = 16,861.52 : x
  2. Step 2: Convert to fraction form
    28,802.72/39,743.52 = 16,861.52/x
  3. Step 3: Cross multiply
    28,802.72x = 39,743.52 × 16,861.52
  4. Step 4: Simplify right side
    28,802.72x = 670,136,157.35
  5. Step 5: Solve for x
    x = 670,136,157.35/28,802.72
  6. Step 6: Final answer
    x = 23,266.42

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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.