Home / 2,831.15-3,906.85-1,572.28

Finding the Fourth Proportional to 2,831.15, 3,906.85 and 1,572.28

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Solution

The fourth proportional to 2,831.15, 3,906.85 and 1,572.28 is: 2,169.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.15 : 3,906.85 = 1,572.28 : x
  2. Step 2: Convert to fraction form
    2,831.15/3,906.85 = 1,572.28/x
  3. Step 3: Cross multiply
    2,831.15x = 3,906.85 × 1,572.28
  4. Step 4: Simplify right side
    2,831.15x = 6,142,658.19
  5. Step 5: Solve for x
    x = 6,142,658.19/2,831.15
  6. Step 6: Final answer
    x = 2,169.67

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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.