Home / 3,688.64-5,090.12-2,116.63

Finding the Fourth Proportional to 3,688.64, 5,090.12 and 2,116.63

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Solution

The fourth proportional to 3,688.64, 5,090.12 and 2,116.63 is: 2,920.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.64 : 5,090.12 = 2,116.63 : x
  2. Step 2: Convert to fraction form
    3,688.64/5,090.12 = 2,116.63/x
  3. Step 3: Cross multiply
    3,688.64x = 5,090.12 × 2,116.63
  4. Step 4: Simplify right side
    3,688.64x = 10,773,875.25
  5. Step 5: Solve for x
    x = 10,773,875.25/3,688.64
  6. Step 6: Final answer
    x = 2,920.83

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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.