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Finding the Fourth Proportional to 9,390.70, 12,960.57 and 5,855.05

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Solution

The fourth proportional to 9,390.70, 12,960.57 and 5,855.05 is: 8,080.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,390.70 : 12,960.57 = 5,855.05 : x
  2. Step 2: Convert to fraction form
    9,390.70/12,960.57 = 5,855.05/x
  3. Step 3: Cross multiply
    9,390.70x = 12,960.57 × 5,855.05
  4. Step 4: Simplify right side
    9,390.70x = 75,884,785.38
  5. Step 5: Solve for x
    x = 75,884,785.38/9,390.70
  6. Step 6: Final answer
    x = 8,080.84

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Similar ratio
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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.