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Finding the Fourth Proportional to 7,290.21, 10,061 and 4,103.81

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Solution

The fourth proportional to 7,290.21, 10,061 and 4,103.81 is: 5,663.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,290.21 : 10,061 = 4,103.81 : x
  2. Step 2: Convert to fraction form
    7,290.21/10,061 = 4,103.81/x
  3. Step 3: Cross multiply
    7,290.21x = 10,061 × 4,103.81
  4. Step 4: Simplify right side
    7,290.21x = 41,288,432.41
  5. Step 5: Solve for x
    x = 41,288,432.41/7,290.21
  6. Step 6: Final answer
    x = 5,663.55

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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.