Home / 39,882.91-55,035.40-21,977.98

Finding the Fourth Proportional to 39,882.91, 55,035.40 and 21,977.98

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Solution

The fourth proportional to 39,882.91, 55,035.40 and 21,977.98 is: 30,327.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,882.91 : 55,035.40 = 21,977.98 : x
  2. Step 2: Convert to fraction form
    39,882.91/55,035.40 = 21,977.98/x
  3. Step 3: Cross multiply
    39,882.91x = 55,035.40 × 21,977.98
  4. Step 4: Simplify right side
    39,882.91x = 1,209,567,078.74
  5. Step 5: Solve for x
    x = 1,209,567,078.74/39,882.91
  6. Step 6: Final answer
    x = 30,327.96

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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.