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Finding the Fourth Proportional to 12,439.36, 18,652.02 and 4,645

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Solution

The fourth proportional to 12,439.36, 18,652.02 and 4,645 is: 6,964.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.36 : 18,652.02 = 4,645 : x
  2. Step 2: Convert to fraction form
    12,439.36/18,652.02 = 4,645/x
  3. Step 3: Cross multiply
    12,439.36x = 18,652.02 × 4,645
  4. Step 4: Simplify right side
    12,439.36x = 86,638,632.90
  5. Step 5: Solve for x
    x = 86,638,632.90/12,439.36
  6. Step 6: Final answer
    x = 6,964.88

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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.