Home / 39,882.45-55,040.21-21,977.43

Finding the Fourth Proportional to 39,882.45, 55,040.21 and 21,977.43

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Solution

The fourth proportional to 39,882.45, 55,040.21 and 21,977.43 is: 30,330.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,882.45 : 55,040.21 = 21,977.43 : x
  2. Step 2: Convert to fraction form
    39,882.45/55,040.21 = 21,977.43/x
  3. Step 3: Cross multiply
    39,882.45x = 55,040.21 × 21,977.43
  4. Step 4: Simplify right side
    39,882.45x = 1,209,642,252.57
  5. Step 5: Solve for x
    x = 1,209,642,252.57/39,882.45
  6. Step 6: Final answer
    x = 30,330.19

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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.