Home / 2,831.20-4,243.20-2,521.60

Finding the Fourth Proportional to 2,831.20, 4,243.20 and 2,521.60

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Solution

The fourth proportional to 2,831.20, 4,243.20 and 2,521.60 is: 3,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.20 : 4,243.20 = 2,521.60 : x
  2. Step 2: Convert to fraction form
    2,831.20/4,243.20 = 2,521.60/x
  3. Step 3: Cross multiply
    2,831.20x = 4,243.20 × 2,521.60
  4. Step 4: Simplify right side
    2,831.20x = 10,699,653.12
  5. Step 5: Solve for x
    x = 10,699,653.12/2,831.20
  6. Step 6: Final answer
    x = 3,779.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.