Home / 39,783.03-54,900.78-21,879.18

Finding the Fourth Proportional to 39,783.03, 54,900.78 and 21,879.18

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Solution

The fourth proportional to 39,783.03, 54,900.78 and 21,879.18 is: 30,193.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.03 : 54,900.78 = 21,879.18 : x
  2. Step 2: Convert to fraction form
    39,783.03/54,900.78 = 21,879.18/x
  3. Step 3: Cross multiply
    39,783.03x = 54,900.78 × 21,879.18
  4. Step 4: Simplify right side
    39,783.03x = 1,201,184,047.76
  5. Step 5: Solve for x
    x = 1,201,184,047.76/39,783.03
  6. Step 6: Final answer
    x = 30,193.38

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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.