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Finding the Fourth Proportional to 28,429.61, 42,644.21 and 7,369.61

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Solution

The fourth proportional to 28,429.61, 42,644.21 and 7,369.61 is: 11,054.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.61 : 42,644.21 = 7,369.61 : x
  2. Step 2: Convert to fraction form
    28,429.61/42,644.21 = 7,369.61/x
  3. Step 3: Cross multiply
    28,429.61x = 42,644.21 × 7,369.61
  4. Step 4: Simplify right side
    28,429.61x = 314,270,946.39
  5. Step 5: Solve for x
    x = 314,270,946.39/28,429.61
  6. Step 6: Final answer
    x = 11,054.36

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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.