Home / 39,897.20-55,058.52-21,992.90

Finding the Fourth Proportional to 39,897.20, 55,058.52 and 21,992.90

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Solution

The fourth proportional to 39,897.20, 55,058.52 and 21,992.90 is: 30,350.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,897.20 : 55,058.52 = 21,992.90 : x
  2. Step 2: Convert to fraction form
    39,897.20/55,058.52 = 21,992.90/x
  3. Step 3: Cross multiply
    39,897.20x = 55,058.52 × 21,992.90
  4. Step 4: Simplify right side
    39,897.20x = 1,210,896,249.22
  5. Step 5: Solve for x
    x = 1,210,896,249.22/39,897.20
  6. Step 6: Final answer
    x = 30,350.41

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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.