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Finding the Fourth Proportional to 8,640.40, 12,962.43 and 4,893.94

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Solution

The fourth proportional to 8,640.40, 12,962.43 and 4,893.94 is: 7,341.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.40 : 12,962.43 = 4,893.94 : x
  2. Step 2: Convert to fraction form
    8,640.40/12,962.43 = 4,893.94/x
  3. Step 3: Cross multiply
    8,640.40x = 12,962.43 × 4,893.94
  4. Step 4: Simplify right side
    8,640.40x = 63,437,354.67
  5. Step 5: Solve for x
    x = 63,437,354.67/8,640.40
  6. Step 6: Final answer
    x = 7,341.95

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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.