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Finding the Fourth Proportional to 7,328.90, 10,973.90 and 3,858.86

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Solution

The fourth proportional to 7,328.90, 10,973.90 and 3,858.86 is: 5,778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,328.90 : 10,973.90 = 3,858.86 : x
  2. Step 2: Convert to fraction form
    7,328.90/10,973.90 = 3,858.86/x
  3. Step 3: Cross multiply
    7,328.90x = 10,973.90 × 3,858.86
  4. Step 4: Simplify right side
    7,328.90x = 42,346,743.75
  5. Step 5: Solve for x
    x = 42,346,743.75/7,328.90
  6. Step 6: Final answer
    x = 5,778.05

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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.