Home / 39,762.96-54,874.20-21,858.60

Finding the Fourth Proportional to 39,762.96, 54,874.20 and 21,858.60

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Solution

The fourth proportional to 39,762.96, 54,874.20 and 21,858.60 is: 30,165.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,762.96 : 54,874.20 = 21,858.60 : x
  2. Step 2: Convert to fraction form
    39,762.96/54,874.20 = 21,858.60/x
  3. Step 3: Cross multiply
    39,762.96x = 54,874.20 × 21,858.60
  4. Step 4: Simplify right side
    39,762.96x = 1,199,473,188.12
  5. Step 5: Solve for x
    x = 1,199,473,188.12/39,762.96
  6. Step 6: Final answer
    x = 30,165.59

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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.