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Finding the Fourth Proportional to 11,653.80, 17,480.70 and 7,911.60

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Solution

The fourth proportional to 11,653.80, 17,480.70 and 7,911.60 is: 11,867.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,653.80 : 17,480.70 = 7,911.60 : x
  2. Step 2: Convert to fraction form
    11,653.80/17,480.70 = 7,911.60/x
  3. Step 3: Cross multiply
    11,653.80x = 17,480.70 × 7,911.60
  4. Step 4: Simplify right side
    11,653.80x = 138,300,306.12
  5. Step 5: Solve for x
    x = 138,300,306.12/11,653.80
  6. Step 6: Final answer
    x = 11,867.40

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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.