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Finding the Fourth Proportional to 6,999.85, 10,485.94 and 4,218.31

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Solution

The fourth proportional to 6,999.85, 10,485.94 and 4,218.31 is: 6,319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.85 : 10,485.94 = 4,218.31 : x
  2. Step 2: Convert to fraction form
    6,999.85/10,485.94 = 4,218.31/x
  3. Step 3: Cross multiply
    6,999.85x = 10,485.94 × 4,218.31
  4. Step 4: Simplify right side
    6,999.85x = 44,232,945.56
  5. Step 5: Solve for x
    x = 44,232,945.56/6,999.85
  6. Step 6: Final answer
    x = 6,319.13

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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.