Home / 13,408.20-18,506.81-8,631.43

Finding the Fourth Proportional to 13,408.20, 18,506.81 and 8,631.43

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Solution

The fourth proportional to 13,408.20, 18,506.81 and 8,631.43 is: 11,913.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.20 : 18,506.81 = 8,631.43 : x
  2. Step 2: Convert to fraction form
    13,408.20/18,506.81 = 8,631.43/x
  3. Step 3: Cross multiply
    13,408.20x = 18,506.81 × 8,631.43
  4. Step 4: Simplify right side
    13,408.20x = 159,740,210.35
  5. Step 5: Solve for x
    x = 159,740,210.35/13,408.20
  6. Step 6: Final answer
    x = 11,913.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.