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Finding the Fourth Proportional to 19,231.90, 28,851.90 and 6,085.60

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Solution

The fourth proportional to 19,231.90, 28,851.90 and 6,085.60 is: 9,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,231.90 : 28,851.90 = 6,085.60 : x
  2. Step 2: Convert to fraction form
    19,231.90/28,851.90 = 6,085.60/x
  3. Step 3: Cross multiply
    19,231.90x = 28,851.90 × 6,085.60
  4. Step 4: Simplify right side
    19,231.90x = 175,581,122.64
  5. Step 5: Solve for x
    x = 175,581,122.64/19,231.90
  6. Step 6: Final answer
    x = 9,129.68

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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.