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Finding the Fourth Proportional to 8,520.64, 12,763.68 and 4,408

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Solution

The fourth proportional to 8,520.64, 12,763.68 and 4,408 is: 6,603.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.64 : 12,763.68 = 4,408 : x
  2. Step 2: Convert to fraction form
    8,520.64/12,763.68 = 4,408/x
  3. Step 3: Cross multiply
    8,520.64x = 12,763.68 × 4,408
  4. Step 4: Simplify right side
    8,520.64x = 56,262,301.44
  5. Step 5: Solve for x
    x = 56,262,301.44/8,520.64
  6. Step 6: Final answer
    x = 6,603.06

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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.