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Finding the Fourth Proportional to 6,999.20, 10,509.60 and 4,083.20

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Solution

The fourth proportional to 6,999.20, 10,509.60 and 4,083.20 is: 6,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.20 : 10,509.60 = 4,083.20 : x
  2. Step 2: Convert to fraction form
    6,999.20/10,509.60 = 4,083.20/x
  3. Step 3: Cross multiply
    6,999.20x = 10,509.60 × 4,083.20
  4. Step 4: Simplify right side
    6,999.20x = 42,912,798.72
  5. Step 5: Solve for x
    x = 42,912,798.72/6,999.20
  6. Step 6: Final answer
    x = 6,131.10

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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.