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Finding the Fourth Proportional to 13,394.72, 18,494.29 and 8,928.99

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Solution

The fourth proportional to 13,394.72, 18,494.29 and 8,928.99 is: 12,328.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,394.72 : 18,494.29 = 8,928.99 : x
  2. Step 2: Convert to fraction form
    13,394.72/18,494.29 = 8,928.99/x
  3. Step 3: Cross multiply
    13,394.72x = 18,494.29 × 8,928.99
  4. Step 4: Simplify right side
    13,394.72x = 165,135,341.63
  5. Step 5: Solve for x
    x = 165,135,341.63/13,394.72
  6. Step 6: Final answer
    x = 12,328.39

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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.