Home / 40,072.69-60,112.16-13,418.78

Finding the Fourth Proportional to 40,072.69, 60,112.16 and 13,418.78

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Solution

The fourth proportional to 40,072.69, 60,112.16 and 13,418.78 is: 20,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,072.69 : 60,112.16 = 13,418.78 : x
  2. Step 2: Convert to fraction form
    40,072.69/60,112.16 = 13,418.78/x
  3. Step 3: Cross multiply
    40,072.69x = 60,112.16 × 13,418.78
  4. Step 4: Simplify right side
    40,072.69x = 806,631,482.71
  5. Step 5: Solve for x
    x = 806,631,482.71/40,072.69
  6. Step 6: Final answer
    x = 20,129.21

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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.