Home / 39,678.81-54,757.44-21,775.48

Finding the Fourth Proportional to 39,678.81, 54,757.44 and 21,775.48

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Solution

The fourth proportional to 39,678.81, 54,757.44 and 21,775.48 is: 30,050.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.81 : 54,757.44 = 21,775.48 : x
  2. Step 2: Convert to fraction form
    39,678.81/54,757.44 = 21,775.48/x
  3. Step 3: Cross multiply
    39,678.81x = 54,757.44 × 21,775.48
  4. Step 4: Simplify right side
    39,678.81x = 1,192,369,771.93
  5. Step 5: Solve for x
    x = 1,192,369,771.93/39,678.81
  6. Step 6: Final answer
    x = 30,050.54

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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.