Home / 12,431.18-18,640.35-3,664.98

Finding the Fourth Proportional to 12,431.18, 18,640.35 and 3,664.98

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Solution

The fourth proportional to 12,431.18, 18,640.35 and 3,664.98 is: 5,495.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.18 : 18,640.35 = 3,664.98 : x
  2. Step 2: Convert to fraction form
    12,431.18/18,640.35 = 3,664.98/x
  3. Step 3: Cross multiply
    12,431.18x = 18,640.35 × 3,664.98
  4. Step 4: Simplify right side
    12,431.18x = 68,316,509.94
  5. Step 5: Solve for x
    x = 68,316,509.94/12,431.18
  6. Step 6: Final answer
    x = 5,495.58

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1.5x scale

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.