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Finding the Fourth Proportional to 51,021, 70,408.98 and 28,665

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Solution

The fourth proportional to 51,021, 70,408.98 and 28,665 is: 39,557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,021 : 70,408.98 = 28,665 : x
  2. Step 2: Convert to fraction form
    51,021/70,408.98 = 28,665/x
  3. Step 3: Cross multiply
    51,021x = 70,408.98 × 28,665
  4. Step 4: Simplify right side
    51,021x = 2,018,273,411.70
  5. Step 5: Solve for x
    x = 2,018,273,411.70/51,021
  6. Step 6: Final answer
    x = 39,557.70

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.