Home / 3,618.89-4,988.63-2,831.57

Finding the Fourth Proportional to 3,618.89, 4,988.63 and 2,831.57

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Solution

The fourth proportional to 3,618.89, 4,988.63 and 2,831.57 is: 3,903.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.89 : 4,988.63 = 2,831.57 : x
  2. Step 2: Convert to fraction form
    3,618.89/4,988.63 = 2,831.57/x
  3. Step 3: Cross multiply
    3,618.89x = 4,988.63 × 2,831.57
  4. Step 4: Simplify right side
    3,618.89x = 14,125,640.89
  5. Step 5: Solve for x
    x = 14,125,640.89/3,618.89
  6. Step 6: Final answer
    x = 3,903.31

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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.