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Finding the Fourth Proportional to 6,670.72, 10,007.70 and 1,990.54

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Solution

The fourth proportional to 6,670.72, 10,007.70 and 1,990.54 is: 2,986.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,670.72 : 10,007.70 = 1,990.54 : x
  2. Step 2: Convert to fraction form
    6,670.72/10,007.70 = 1,990.54/x
  3. Step 3: Cross multiply
    6,670.72x = 10,007.70 × 1,990.54
  4. Step 4: Simplify right side
    6,670.72x = 19,920,667.17
  5. Step 5: Solve for x
    x = 19,920,667.17/6,670.72
  6. Step 6: Final answer
    x = 2,986.29

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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.