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Finding the Fourth Proportional to 7,108, 9,808.83 and 4,123.63

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Solution

The fourth proportional to 7,108, 9,808.83 and 4,123.63 is: 5,690.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108 : 9,808.83 = 4,123.63 : x
  2. Step 2: Convert to fraction form
    7,108/9,808.83 = 4,123.63/x
  3. Step 3: Cross multiply
    7,108x = 9,808.83 × 4,123.63
  4. Step 4: Simplify right side
    7,108x = 40,447,985.65
  5. Step 5: Solve for x
    x = 40,447,985.65/7,108
  6. Step 6: Final answer
    x = 5,690.49

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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.