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Finding the Fourth Proportional to 8,404.20, 12,615.90 and 4,943.40

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Solution

The fourth proportional to 8,404.20, 12,615.90 and 4,943.40 is: 7,420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,404.20 : 12,615.90 = 4,943.40 : x
  2. Step 2: Convert to fraction form
    8,404.20/12,615.90 = 4,943.40/x
  3. Step 3: Cross multiply
    8,404.20x = 12,615.90 × 4,943.40
  4. Step 4: Simplify right side
    8,404.20x = 62,365,440.06
  5. Step 5: Solve for x
    x = 62,365,440.06/8,404.20
  6. Step 6: Final answer
    x = 7,420.75

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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.