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Finding the Fourth Proportional to 11,485.80, 17,228.70 and 11,412.90

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Solution

The fourth proportional to 11,485.80, 17,228.70 and 11,412.90 is: 17,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,485.80 : 17,228.70 = 11,412.90 : x
  2. Step 2: Convert to fraction form
    11,485.80/17,228.70 = 11,412.90/x
  3. Step 3: Cross multiply
    11,485.80x = 17,228.70 × 11,412.90
  4. Step 4: Simplify right side
    11,485.80x = 196,629,430.23
  5. Step 5: Solve for x
    x = 196,629,430.23/11,485.80
  6. Step 6: Final answer
    x = 17,119.35

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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.