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Finding the Fourth Proportional to 12,804.21, 19,215 and 4,484.30

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Solution

The fourth proportional to 12,804.21, 19,215 and 4,484.30 is: 6,729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,804.21 : 19,215 = 4,484.30 : x
  2. Step 2: Convert to fraction form
    12,804.21/19,215 = 4,484.30/x
  3. Step 3: Cross multiply
    12,804.21x = 19,215 × 4,484.30
  4. Step 4: Simplify right side
    12,804.21x = 86,165,728.43
  5. Step 5: Solve for x
    x = 86,165,728.43/12,804.21
  6. Step 6: Final answer
    x = 6,729.48

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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.