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Finding the Fourth Proportional to 7,870.80, 11,795.84 and 3,705.16

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Solution

The fourth proportional to 7,870.80, 11,795.84 and 3,705.16 is: 5,552.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.80 : 11,795.84 = 3,705.16 : x
  2. Step 2: Convert to fraction form
    7,870.80/11,795.84 = 3,705.16/x
  3. Step 3: Cross multiply
    7,870.80x = 11,795.84 × 3,705.16
  4. Step 4: Simplify right side
    7,870.80x = 43,705,474.53
  5. Step 5: Solve for x
    x = 43,705,474.53/7,870.80
  6. Step 6: Final answer
    x = 5,552.86

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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.