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Finding the Fourth Proportional to 8,911.80, 13,362.84 and 7,074.72

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Solution

The fourth proportional to 8,911.80, 13,362.84 and 7,074.72 is: 10,608.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.80 : 13,362.84 = 7,074.72 : x
  2. Step 2: Convert to fraction form
    8,911.80/13,362.84 = 7,074.72/x
  3. Step 3: Cross multiply
    8,911.80x = 13,362.84 × 7,074.72
  4. Step 4: Simplify right side
    8,911.80x = 94,538,351.40
  5. Step 5: Solve for x
    x = 94,538,351.40/8,911.80
  6. Step 6: Final answer
    x = 10,608.22

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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.