Home / 2,831.57-3,907.68-1,555.50

Finding the Fourth Proportional to 2,831.57, 3,907.68 and 1,555.50

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Solution

The fourth proportional to 2,831.57, 3,907.68 and 1,555.50 is: 2,146.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.57 : 3,907.68 = 1,555.50 : x
  2. Step 2: Convert to fraction form
    2,831.57/3,907.68 = 1,555.50/x
  3. Step 3: Cross multiply
    2,831.57x = 3,907.68 × 1,555.50
  4. Step 4: Simplify right side
    2,831.57x = 6,078,396.24
  5. Step 5: Solve for x
    x = 6,078,396.24/2,831.57
  6. Step 6: Final answer
    x = 2,146.66

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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.