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Finding the Fourth Proportional to 7,993.74, 11,988.54 and 3,315.08

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Solution

The fourth proportional to 7,993.74, 11,988.54 and 3,315.08 is: 4,971.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,993.74 : 11,988.54 = 3,315.08 : x
  2. Step 2: Convert to fraction form
    7,993.74/11,988.54 = 3,315.08/x
  3. Step 3: Cross multiply
    7,993.74x = 11,988.54 × 3,315.08
  4. Step 4: Simplify right side
    7,993.74x = 39,742,999.15
  5. Step 5: Solve for x
    x = 39,742,999.15/7,993.74
  6. Step 6: Final answer
    x = 4,971.76

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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.