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Finding the Fourth Proportional to 11,453.85, 15,806.49 and 6,977.79

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Solution

The fourth proportional to 11,453.85, 15,806.49 and 6,977.79 is: 9,629.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,453.85 : 15,806.49 = 6,977.79 : x
  2. Step 2: Convert to fraction form
    11,453.85/15,806.49 = 6,977.79/x
  3. Step 3: Cross multiply
    11,453.85x = 15,806.49 × 6,977.79
  4. Step 4: Simplify right side
    11,453.85x = 110,294,367.86
  5. Step 5: Solve for x
    x = 110,294,367.86/11,453.85
  6. Step 6: Final answer
    x = 9,629.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.