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Finding the Fourth Proportional to 6,670.98, 10,000.98 and 3,890.79

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Solution

The fourth proportional to 6,670.98, 10,000.98 and 3,890.79 is: 5,832.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,670.98 : 10,000.98 = 3,890.79 : x
  2. Step 2: Convert to fraction form
    6,670.98/10,000.98 = 3,890.79/x
  3. Step 3: Cross multiply
    6,670.98x = 10,000.98 × 3,890.79
  4. Step 4: Simplify right side
    6,670.98x = 38,911,712.97
  5. Step 5: Solve for x
    x = 38,911,712.97/6,670.98
  6. Step 6: Final answer
    x = 5,832.98

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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.