Home / 3,813.86-5,261.13-2,880.74

Finding the Fourth Proportional to 3,813.86, 5,261.13 and 2,880.74

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Solution

The fourth proportional to 3,813.86, 5,261.13 and 2,880.74 is: 3,973.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.86 : 5,261.13 = 2,880.74 : x
  2. Step 2: Convert to fraction form
    3,813.86/5,261.13 = 2,880.74/x
  3. Step 3: Cross multiply
    3,813.86x = 5,261.13 × 2,880.74
  4. Step 4: Simplify right side
    3,813.86x = 15,155,947.64
  5. Step 5: Solve for x
    x = 15,155,947.64/3,813.86
  6. Step 6: Final answer
    x = 3,973.91

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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.