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Finding the Fourth Proportional to 11,914.88, 17,870.81 and 3,150.48

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Solution

The fourth proportional to 11,914.88, 17,870.81 and 3,150.48 is: 4,725.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,914.88 : 17,870.81 = 3,150.48 : x
  2. Step 2: Convert to fraction form
    11,914.88/17,870.81 = 3,150.48/x
  3. Step 3: Cross multiply
    11,914.88x = 17,870.81 × 3,150.48
  4. Step 4: Simplify right side
    11,914.88x = 56,301,613.74
  5. Step 5: Solve for x
    x = 56,301,613.74/11,914.88
  6. Step 6: Final answer
    x = 4,725.32

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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.