Home / 45,415.41-68,131.26-18,761.40

Finding the Fourth Proportional to 45,415.41, 68,131.26 and 18,761.40

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Solution

The fourth proportional to 45,415.41, 68,131.26 and 18,761.40 is: 28,145.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,415.41 : 68,131.26 = 18,761.40 : x
  2. Step 2: Convert to fraction form
    45,415.41/68,131.26 = 18,761.40/x
  3. Step 3: Cross multiply
    45,415.41x = 68,131.26 × 18,761.40
  4. Step 4: Simplify right side
    45,415.41x = 1,278,237,821.36
  5. Step 5: Solve for x
    x = 1,278,237,821.36/45,415.41
  6. Step 6: Final answer
    x = 28,145.46

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1.5x scale

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.