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Finding the Fourth Proportional to 13,751.49, 18,976.48 and 7,783.49

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Solution

The fourth proportional to 13,751.49, 18,976.48 and 7,783.49 is: 10,740.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.49 : 18,976.48 = 7,783.49 : x
  2. Step 2: Convert to fraction form
    13,751.49/18,976.48 = 7,783.49/x
  3. Step 3: Cross multiply
    13,751.49x = 18,976.48 × 7,783.49
  4. Step 4: Simplify right side
    13,751.49x = 147,703,108.52
  5. Step 5: Solve for x
    x = 147,703,108.52/13,751.49
  6. Step 6: Final answer
    x = 10,740.88

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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.