Home / 19,418.60-29,139.90-7,730.60

Finding the Fourth Proportional to 19,418.60, 29,139.90 and 7,730.60

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Solution

The fourth proportional to 19,418.60, 29,139.90 and 7,730.60 is: 11,600.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,418.60 : 29,139.90 = 7,730.60 : x
  2. Step 2: Convert to fraction form
    19,418.60/29,139.90 = 7,730.60/x
  3. Step 3: Cross multiply
    19,418.60x = 29,139.90 × 7,730.60
  4. Step 4: Simplify right side
    19,418.60x = 225,268,910.94
  5. Step 5: Solve for x
    x = 225,268,910.94/19,418.60
  6. Step 6: Final answer
    x = 11,600.68

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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.