Home / 12,455.31-18,679.77-3,688.17

Finding the Fourth Proportional to 12,455.31, 18,679.77 and 3,688.17

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Solution

The fourth proportional to 12,455.31, 18,679.77 and 3,688.17 is: 5,531.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.31 : 18,679.77 = 3,688.17 : x
  2. Step 2: Convert to fraction form
    12,455.31/18,679.77 = 3,688.17/x
  3. Step 3: Cross multiply
    12,455.31x = 18,679.77 × 3,688.17
  4. Step 4: Simplify right side
    12,455.31x = 68,894,178.67
  5. Step 5: Solve for x
    x = 68,894,178.67/12,455.31
  6. Step 6: Final answer
    x = 5,531.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.