Home / 9,120.21-12,591.32-5,981.87

Finding the Fourth Proportional to 9,120.21, 12,591.32 and 5,981.87

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Solution

The fourth proportional to 9,120.21, 12,591.32 and 5,981.87 is: 8,258.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.21 : 12,591.32 = 5,981.87 : x
  2. Step 2: Convert to fraction form
    9,120.21/12,591.32 = 5,981.87/x
  3. Step 3: Cross multiply
    9,120.21x = 12,591.32 × 5,981.87
  4. Step 4: Simplify right side
    9,120.21x = 75,319,546.50
  5. Step 5: Solve for x
    x = 75,319,546.50/9,120.21
  6. Step 6: Final answer
    x = 8,258.53

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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.