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Finding the Fourth Proportional to 38,518, 53,151.96 and 21,750.64

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Solution

The fourth proportional to 38,518, 53,151.96 and 21,750.64 is: 30,014.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,518 : 53,151.96 = 21,750.64 : x
  2. Step 2: Convert to fraction form
    38,518/53,151.96 = 21,750.64/x
  3. Step 3: Cross multiply
    38,518x = 53,151.96 × 21,750.64
  4. Step 4: Simplify right side
    38,518x = 1,156,089,147.25
  5. Step 5: Solve for x
    x = 1,156,089,147.25/38,518
  6. Step 6: Final answer
    x = 30,014.26

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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.