Home / 39,218.89-54,122.42-21,313.90

Finding the Fourth Proportional to 39,218.89, 54,122.42 and 21,313.90

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Solution

The fourth proportional to 39,218.89, 54,122.42 and 21,313.90 is: 29,413.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,218.89 : 54,122.42 = 21,313.90 : x
  2. Step 2: Convert to fraction form
    39,218.89/54,122.42 = 21,313.90/x
  3. Step 3: Cross multiply
    39,218.89x = 54,122.42 × 21,313.90
  4. Step 4: Simplify right side
    39,218.89x = 1,153,559,847.64
  5. Step 5: Solve for x
    x = 1,153,559,847.64/39,218.89
  6. Step 6: Final answer
    x = 29,413.37

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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.