Home / 19,138.86-28,697.25-7,438.41

Finding the Fourth Proportional to 19,138.86, 28,697.25 and 7,438.41

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Solution

The fourth proportional to 19,138.86, 28,697.25 and 7,438.41 is: 11,153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.86 : 28,697.25 = 7,438.41 : x
  2. Step 2: Convert to fraction form
    19,138.86/28,697.25 = 7,438.41/x
  3. Step 3: Cross multiply
    19,138.86x = 28,697.25 × 7,438.41
  4. Step 4: Simplify right side
    19,138.86x = 213,461,911.37
  5. Step 5: Solve for x
    x = 213,461,911.37/19,138.86
  6. Step 6: Final answer
    x = 11,153.32

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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.