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Finding the Fourth Proportional to 7,695.90, 10,620.15 and 4,338.75

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Solution

The fourth proportional to 7,695.90, 10,620.15 and 4,338.75 is: 5,987.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,695.90 : 10,620.15 = 4,338.75 : x
  2. Step 2: Convert to fraction form
    7,695.90/10,620.15 = 4,338.75/x
  3. Step 3: Cross multiply
    7,695.90x = 10,620.15 × 4,338.75
  4. Step 4: Simplify right side
    7,695.90x = 46,078,175.81
  5. Step 5: Solve for x
    x = 46,078,175.81/7,695.90
  6. Step 6: Final answer
    x = 5,987.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.