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Finding the Fourth Proportional to 6,990.48, 9,648.36 and 4,006.80

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Solution

The fourth proportional to 6,990.48, 9,648.36 and 4,006.80 is: 5,530.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.48 : 9,648.36 = 4,006.80 : x
  2. Step 2: Convert to fraction form
    6,990.48/9,648.36 = 4,006.80/x
  3. Step 3: Cross multiply
    6,990.48x = 9,648.36 × 4,006.80
  4. Step 4: Simplify right side
    6,990.48x = 38,659,048.85
  5. Step 5: Solve for x
    x = 38,659,048.85/6,990.48
  6. Step 6: Final answer
    x = 5,530.24

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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.