Home / 55,740-76,921.32-30,589.44

Finding the Fourth Proportional to 55,740, 76,921.32 and 30,589.44

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Solution

The fourth proportional to 55,740, 76,921.32 and 30,589.44 is: 42,213.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,740 : 76,921.32 = 30,589.44 : x
  2. Step 2: Convert to fraction form
    55,740/76,921.32 = 30,589.44/x
  3. Step 3: Cross multiply
    55,740x = 76,921.32 × 30,589.44
  4. Step 4: Simplify right side
    55,740x = 2,352,980,102.86
  5. Step 5: Solve for x
    x = 2,352,980,102.86/55,740
  6. Step 6: Final answer
    x = 42,213.49

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1.5x scale

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.