Home / 39,743.78-54,846.38-21,838.75

Finding the Fourth Proportional to 39,743.78, 54,846.38 and 21,838.75

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Solution

The fourth proportional to 39,743.78, 54,846.38 and 21,838.75 is: 30,137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,743.78 : 54,846.38 = 21,838.75 : x
  2. Step 2: Convert to fraction form
    39,743.78/54,846.38 = 21,838.75/x
  3. Step 3: Cross multiply
    39,743.78x = 54,846.38 × 21,838.75
  4. Step 4: Simplify right side
    39,743.78x = 1,197,776,381.23
  5. Step 5: Solve for x
    x = 1,197,776,381.23/39,743.78
  6. Step 6: Final answer
    x = 30,137.45

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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.