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Finding the Fourth Proportional to 7,980.90, 11,955.16 and 3,700.61

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Solution

The fourth proportional to 7,980.90, 11,955.16 and 3,700.61 is: 5,543.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.90 : 11,955.16 = 3,700.61 : x
  2. Step 2: Convert to fraction form
    7,980.90/11,955.16 = 3,700.61/x
  3. Step 3: Cross multiply
    7,980.90x = 11,955.16 × 3,700.61
  4. Step 4: Simplify right side
    7,980.90x = 44,241,384.65
  5. Step 5: Solve for x
    x = 44,241,384.65/7,980.90
  6. Step 6: Final answer
    x = 5,543.41

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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.