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Finding the Fourth Proportional to 9,319.15, 13,978.73 and 6,388.57

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Solution

The fourth proportional to 9,319.15, 13,978.73 and 6,388.57 is: 9,582.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,319.15 : 13,978.73 = 6,388.57 : x
  2. Step 2: Convert to fraction form
    9,319.15/13,978.73 = 6,388.57/x
  3. Step 3: Cross multiply
    9,319.15x = 13,978.73 × 6,388.57
  4. Step 4: Simplify right side
    9,319.15x = 89,304,092.63
  5. Step 5: Solve for x
    x = 89,304,092.63/9,319.15
  6. Step 6: Final answer
    x = 9,582.86

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1.5x scale

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.