Home / 30,629.53-45,871.39-21,278.89

Finding the Fourth Proportional to 30,629.53, 45,871.39 and 21,278.89

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Solution

The fourth proportional to 30,629.53, 45,871.39 and 21,278.89 is: 31,867.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,629.53 : 45,871.39 = 21,278.89 : x
  2. Step 2: Convert to fraction form
    30,629.53/45,871.39 = 21,278.89/x
  3. Step 3: Cross multiply
    30,629.53x = 45,871.39 × 21,278.89
  4. Step 4: Simplify right side
    30,629.53x = 976,092,261.96
  5. Step 5: Solve for x
    x = 976,092,261.96/30,629.53
  6. Step 6: Final answer
    x = 31,867.69

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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.