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Finding the Fourth Proportional to 7,904.70, 11,860.74 and 3,521.70

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Solution

The fourth proportional to 7,904.70, 11,860.74 and 3,521.70 is: 5,284.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,904.70 : 11,860.74 = 3,521.70 : x
  2. Step 2: Convert to fraction form
    7,904.70/11,860.74 = 3,521.70/x
  3. Step 3: Cross multiply
    7,904.70x = 11,860.74 × 3,521.70
  4. Step 4: Simplify right side
    7,904.70x = 41,769,968.06
  5. Step 5: Solve for x
    x = 41,769,968.06/7,904.70
  6. Step 6: Final answer
    x = 5,284.19

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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.