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Finding the Fourth Proportional to 12,399.48, 18,599.21 and 3,165.48

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Solution

The fourth proportional to 12,399.48, 18,599.21 and 3,165.48 is: 4,748.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.48 : 18,599.21 = 3,165.48 : x
  2. Step 2: Convert to fraction form
    12,399.48/18,599.21 = 3,165.48/x
  3. Step 3: Cross multiply
    12,399.48x = 18,599.21 × 3,165.48
  4. Step 4: Simplify right side
    12,399.48x = 58,875,411.44
  5. Step 5: Solve for x
    x = 58,875,411.44/12,399.48
  6. Step 6: Final answer
    x = 4,748.22

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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.