Home / 39,774.42-54,889.11-21,869.78

Finding the Fourth Proportional to 39,774.42, 54,889.11 and 21,869.78

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Solution

The fourth proportional to 39,774.42, 54,889.11 and 21,869.78 is: 30,180.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,774.42 : 54,889.11 = 21,869.78 : x
  2. Step 2: Convert to fraction form
    39,774.42/54,889.11 = 21,869.78/x
  3. Step 3: Cross multiply
    39,774.42x = 54,889.11 × 21,869.78
  4. Step 4: Simplify right side
    39,774.42x = 1,200,412,485.65
  5. Step 5: Solve for x
    x = 1,200,412,485.65/39,774.42
  6. Step 6: Final answer
    x = 30,180.52

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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.