Home / 39,865.78-55,014.84-21,960.85

Finding the Fourth Proportional to 39,865.78, 55,014.84 and 21,960.85

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Solution

The fourth proportional to 39,865.78, 55,014.84 and 21,960.85 is: 30,306.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,865.78 : 55,014.84 = 21,960.85 : x
  2. Step 2: Convert to fraction form
    39,865.78/55,014.84 = 21,960.85/x
  3. Step 3: Cross multiply
    39,865.78x = 55,014.84 × 21,960.85
  4. Step 4: Simplify right side
    39,865.78x = 1,208,172,649.01
  5. Step 5: Solve for x
    x = 1,208,172,649.01/39,865.78
  6. Step 6: Final answer
    x = 30,306.01

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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.