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Finding the Fourth Proportional to 7,980.38, 11,970.56 and 2,508.38

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Solution

The fourth proportional to 7,980.38, 11,970.56 and 2,508.38 is: 3,762.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.38 : 11,970.56 = 2,508.38 : x
  2. Step 2: Convert to fraction form
    7,980.38/11,970.56 = 2,508.38/x
  3. Step 3: Cross multiply
    7,980.38x = 11,970.56 × 2,508.38
  4. Step 4: Simplify right side
    7,980.38x = 30,026,659.71
  5. Step 5: Solve for x
    x = 30,026,659.71/7,980.38
  6. Step 6: Final answer
    x = 3,762.56

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1.5x scale

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.