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Finding the Fourth Proportional to 8,999, 12,420.30 and 5,273

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Solution

The fourth proportional to 8,999, 12,420.30 and 5,273 is: 7,277.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999 : 12,420.30 = 5,273 : x
  2. Step 2: Convert to fraction form
    8,999/12,420.30 = 5,273/x
  3. Step 3: Cross multiply
    8,999x = 12,420.30 × 5,273
  4. Step 4: Simplify right side
    8,999x = 65,492,241.90
  5. Step 5: Solve for x
    x = 65,492,241.90/8,999
  6. Step 6: Final answer
    x = 7,277.72

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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.