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Finding the Fourth Proportional to 6,408.21, 9,612.81 and 1,728.14

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Solution

The fourth proportional to 6,408.21, 9,612.81 and 1,728.14 is: 2,592.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,408.21 : 9,612.81 = 1,728.14 : x
  2. Step 2: Convert to fraction form
    6,408.21/9,612.81 = 1,728.14/x
  3. Step 3: Cross multiply
    6,408.21x = 9,612.81 × 1,728.14
  4. Step 4: Simplify right side
    6,408.21x = 16,612,281.47
  5. Step 5: Solve for x
    x = 16,612,281.47/6,408.21
  6. Step 6: Final answer
    x = 2,592.35

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1.5x scale

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.