Home / 42,811.67-64,190.16-20,580.81

Finding the Fourth Proportional to 42,811.67, 64,190.16 and 20,580.81

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Solution

The fourth proportional to 42,811.67, 64,190.16 and 20,580.81 is: 30,858.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,811.67 : 64,190.16 = 20,580.81 : x
  2. Step 2: Convert to fraction form
    42,811.67/64,190.16 = 20,580.81/x
  3. Step 3: Cross multiply
    42,811.67x = 64,190.16 × 20,580.81
  4. Step 4: Simplify right side
    42,811.67x = 1,321,085,486.83
  5. Step 5: Solve for x
    x = 1,321,085,486.83/42,811.67
  6. Step 6: Final answer
    x = 30,858.07

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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.