Home / 39,783.84-54,899.82-21,879.60

Finding the Fourth Proportional to 39,783.84, 54,899.82 and 21,879.60

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Solution

The fourth proportional to 39,783.84, 54,899.82 and 21,879.60 is: 30,192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.84 : 54,899.82 = 21,879.60 : x
  2. Step 2: Convert to fraction form
    39,783.84/54,899.82 = 21,879.60/x
  3. Step 3: Cross multiply
    39,783.84x = 54,899.82 × 21,879.60
  4. Step 4: Simplify right side
    39,783.84x = 1,201,186,101.67
  5. Step 5: Solve for x
    x = 1,201,186,101.67/39,783.84
  6. Step 6: Final answer
    x = 30,192.81

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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.