Home / 12,620.48-18,916.56-4,292.72

Finding the Fourth Proportional to 12,620.48, 18,916.56 and 4,292.72

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Solution

The fourth proportional to 12,620.48, 18,916.56 and 4,292.72 is: 6,434.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.48 : 18,916.56 = 4,292.72 : x
  2. Step 2: Convert to fraction form
    12,620.48/18,916.56 = 4,292.72/x
  3. Step 3: Cross multiply
    12,620.48x = 18,916.56 × 4,292.72
  4. Step 4: Simplify right side
    12,620.48x = 81,203,495.44
  5. Step 5: Solve for x
    x = 81,203,495.44/12,620.48
  6. Step 6: Final answer
    x = 6,434.26

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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.