Home / 40,939.77-61,420.39-12,858.69

Finding the Fourth Proportional to 40,939.77, 61,420.39 and 12,858.69

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Solution

The fourth proportional to 40,939.77, 61,420.39 and 12,858.69 is: 19,291.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,939.77 : 61,420.39 = 12,858.69 : x
  2. Step 2: Convert to fraction form
    40,939.77/61,420.39 = 12,858.69/x
  3. Step 3: Cross multiply
    40,939.77x = 61,420.39 × 12,858.69
  4. Step 4: Simplify right side
    40,939.77x = 789,785,722.54
  5. Step 5: Solve for x
    x = 789,785,722.54/40,939.77
  6. Step 6: Final answer
    x = 19,291.41

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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.