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Finding the Fourth Proportional to 6,990.98, 9,647.58 and 4,006.88

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Solution

The fourth proportional to 6,990.98, 9,647.58 and 4,006.88 is: 5,529.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.98 : 9,647.58 = 4,006.88 : x
  2. Step 2: Convert to fraction form
    6,990.98/9,647.58 = 4,006.88/x
  3. Step 3: Cross multiply
    6,990.98x = 9,647.58 × 4,006.88
  4. Step 4: Simplify right side
    6,990.98x = 38,656,695.35
  5. Step 5: Solve for x
    x = 38,656,695.35/6,990.98
  6. Step 6: Final answer
    x = 5,529.51

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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.