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Finding the Fourth Proportional to 9,319.12, 13,978.36 and 4,387.12

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Solution

The fourth proportional to 9,319.12, 13,978.36 and 4,387.12 is: 6,580.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,319.12 : 13,978.36 = 4,387.12 : x
  2. Step 2: Convert to fraction form
    9,319.12/13,978.36 = 4,387.12/x
  3. Step 3: Cross multiply
    9,319.12x = 13,978.36 × 4,387.12
  4. Step 4: Simplify right side
    9,319.12x = 61,324,742.72
  5. Step 5: Solve for x
    x = 61,324,742.72/9,319.12
  6. Step 6: Final answer
    x = 6,580.53

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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.