Home / 3,685.07-5,085.51-2,112.86

Finding the Fourth Proportional to 3,685.07, 5,085.51 and 2,112.86

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Solution

The fourth proportional to 3,685.07, 5,085.51 and 2,112.86 is: 2,915.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,685.07 : 5,085.51 = 2,112.86 : x
  2. Step 2: Convert to fraction form
    3,685.07/5,085.51 = 2,112.86/x
  3. Step 3: Cross multiply
    3,685.07x = 5,085.51 × 2,112.86
  4. Step 4: Simplify right side
    3,685.07x = 10,744,970.66
  5. Step 5: Solve for x
    x = 10,744,970.66/3,685.07
  6. Step 6: Final answer
    x = 2,915.81

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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.