Home / 12,640.05-18,954.61-9,720.41

Finding the Fourth Proportional to 12,640.05, 18,954.61 and 9,720.41

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Solution

The fourth proportional to 12,640.05, 18,954.61 and 9,720.41 is: 14,576.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.05 : 18,954.61 = 9,720.41 : x
  2. Step 2: Convert to fraction form
    12,640.05/18,954.61 = 9,720.41/x
  3. Step 3: Cross multiply
    12,640.05x = 18,954.61 × 9,720.41
  4. Step 4: Simplify right side
    12,640.05x = 184,246,461.52
  5. Step 5: Solve for x
    x = 184,246,461.52/12,640.05
  6. Step 6: Final answer
    x = 14,576.40

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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.