Home / 39,874.81-55,025.94-21,969.76

Finding the Fourth Proportional to 39,874.81, 55,025.94 and 21,969.76

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Solution

The fourth proportional to 39,874.81, 55,025.94 and 21,969.76 is: 30,317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,874.81 : 55,025.94 = 21,969.76 : x
  2. Step 2: Convert to fraction form
    39,874.81/55,025.94 = 21,969.76/x
  3. Step 3: Cross multiply
    39,874.81x = 55,025.94 × 21,969.76
  4. Step 4: Simplify right side
    39,874.81x = 1,208,906,695.57
  5. Step 5: Solve for x
    x = 1,208,906,695.57/39,874.81
  6. Step 6: Final answer
    x = 30,317.55

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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.