Home / 12,403.31-18,605.11-3,638.40

Finding the Fourth Proportional to 12,403.31, 18,605.11 and 3,638.40

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Solution

The fourth proportional to 12,403.31, 18,605.11 and 3,638.40 is: 5,457.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,403.31 : 18,605.11 = 3,638.40 : x
  2. Step 2: Convert to fraction form
    12,403.31/18,605.11 = 3,638.40/x
  3. Step 3: Cross multiply
    12,403.31x = 18,605.11 × 3,638.40
  4. Step 4: Simplify right side
    12,403.31x = 67,692,832.22
  5. Step 5: Solve for x
    x = 67,692,832.22/12,403.31
  6. Step 6: Final answer
    x = 5,457.64

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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.