Home / 55,531.12-76,629.90-30,379

Finding the Fourth Proportional to 55,531.12, 76,629.90 and 30,379

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Solution

The fourth proportional to 55,531.12, 76,629.90 and 30,379 is: 41,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,531.12 : 76,629.90 = 30,379 : x
  2. Step 2: Convert to fraction form
    55,531.12/76,629.90 = 30,379/x
  3. Step 3: Cross multiply
    55,531.12x = 76,629.90 × 30,379
  4. Step 4: Simplify right side
    55,531.12x = 2,327,939,732.10
  5. Step 5: Solve for x
    x = 2,327,939,732.10/55,531.12
  6. Step 6: Final answer
    x = 41,921.35

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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.