Home / 9,831.78-13,569.12-5,640.03

Finding the Fourth Proportional to 9,831.78, 13,569.12 and 5,640.03

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Solution

The fourth proportional to 9,831.78, 13,569.12 and 5,640.03 is: 7,783.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,831.78 : 13,569.12 = 5,640.03 : x
  2. Step 2: Convert to fraction form
    9,831.78/13,569.12 = 5,640.03/x
  3. Step 3: Cross multiply
    9,831.78x = 13,569.12 × 5,640.03
  4. Step 4: Simplify right side
    9,831.78x = 76,530,243.87
  5. Step 5: Solve for x
    x = 76,530,243.87/9,831.78
  6. Step 6: Final answer
    x = 7,783.97

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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.