Home / 3,865.47-5,336.58-2,688.12

Finding the Fourth Proportional to 3,865.47, 5,336.58 and 2,688.12

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Solution

The fourth proportional to 3,865.47, 5,336.58 and 2,688.12 is: 3,711.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.47 : 5,336.58 = 2,688.12 : x
  2. Step 2: Convert to fraction form
    3,865.47/5,336.58 = 2,688.12/x
  3. Step 3: Cross multiply
    3,865.47x = 5,336.58 × 2,688.12
  4. Step 4: Simplify right side
    3,865.47x = 14,345,367.43
  5. Step 5: Solve for x
    x = 14,345,367.43/3,865.47
  6. Step 6: Final answer
    x = 3,711.16

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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.