Home / 38,280.78-52,831.85-21,286.71

Finding the Fourth Proportional to 38,280.78, 52,831.85 and 21,286.71

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Solution

The fourth proportional to 38,280.78, 52,831.85 and 21,286.71 is: 29,378.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,280.78 : 52,831.85 = 21,286.71 : x
  2. Step 2: Convert to fraction form
    38,280.78/52,831.85 = 21,286.71/x
  3. Step 3: Cross multiply
    38,280.78x = 52,831.85 × 21,286.71
  4. Step 4: Simplify right side
    38,280.78x = 1,124,616,163.28
  5. Step 5: Solve for x
    x = 1,124,616,163.28/38,280.78
  6. Step 6: Final answer
    x = 29,378.09

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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.