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Finding the Fourth Proportional to 12,648.29, 18,982.76 and 8,954.10

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Solution

The fourth proportional to 12,648.29, 18,982.76 and 8,954.10 is: 13,438.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,648.29 : 18,982.76 = 8,954.10 : x
  2. Step 2: Convert to fraction form
    12,648.29/18,982.76 = 8,954.10/x
  3. Step 3: Cross multiply
    12,648.29x = 18,982.76 × 8,954.10
  4. Step 4: Simplify right side
    12,648.29x = 169,973,486.55
  5. Step 5: Solve for x
    x = 169,973,486.55/12,648.29
  6. Step 6: Final answer
    x = 13,438.46

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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.