Home / 3,688.94-5,090.64-2,117

Finding the Fourth Proportional to 3,688.94, 5,090.64 and 2,117

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Solution

The fourth proportional to 3,688.94, 5,090.64 and 2,117 is: 2,921.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.94 : 5,090.64 = 2,117 : x
  2. Step 2: Convert to fraction form
    3,688.94/5,090.64 = 2,117/x
  3. Step 3: Cross multiply
    3,688.94x = 5,090.64 × 2,117
  4. Step 4: Simplify right side
    3,688.94x = 10,776,884.88
  5. Step 5: Solve for x
    x = 10,776,884.88/3,688.94
  6. Step 6: Final answer
    x = 2,921.40

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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.