Home / 39,883.08-55,039.02-21,978.73

Finding the Fourth Proportional to 39,883.08, 55,039.02 and 21,978.73

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Solution

The fourth proportional to 39,883.08, 55,039.02 and 21,978.73 is: 30,330.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.08 : 55,039.02 = 21,978.73 : x
  2. Step 2: Convert to fraction form
    39,883.08/55,039.02 = 21,978.73/x
  3. Step 3: Cross multiply
    39,883.08x = 55,039.02 × 21,978.73
  4. Step 4: Simplify right side
    39,883.08x = 1,209,687,622.45
  5. Step 5: Solve for x
    x = 1,209,687,622.45/39,883.08
  6. Step 6: Final answer
    x = 30,330.85

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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.