Home / 13,385.21-18,465.41-9,408.63

Finding the Fourth Proportional to 13,385.21, 18,465.41 and 9,408.63

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Solution

The fourth proportional to 13,385.21, 18,465.41 and 9,408.63 is: 12,979.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.21 : 18,465.41 = 9,408.63 : x
  2. Step 2: Convert to fraction form
    13,385.21/18,465.41 = 9,408.63/x
  3. Step 3: Cross multiply
    13,385.21x = 18,465.41 × 9,408.63
  4. Step 4: Simplify right side
    13,385.21x = 173,734,234.01
  5. Step 5: Solve for x
    x = 173,734,234.01/13,385.21
  6. Step 6: Final answer
    x = 12,979.56

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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.