Home / 39,458.78-54,454.42-21,555.45

Finding the Fourth Proportional to 39,458.78, 54,454.42 and 21,555.45

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Solution

The fourth proportional to 39,458.78, 54,454.42 and 21,555.45 is: 29,747.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,458.78 : 54,454.42 = 21,555.45 : x
  2. Step 2: Convert to fraction form
    39,458.78/54,454.42 = 21,555.45/x
  3. Step 3: Cross multiply
    39,458.78x = 54,454.42 × 21,555.45
  4. Step 4: Simplify right side
    39,458.78x = 1,173,789,473.70
  5. Step 5: Solve for x
    x = 1,173,789,473.70/39,458.78
  6. Step 6: Final answer
    x = 29,747.24

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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.