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Finding the Fourth Proportional to 10,954.40, 16,431.60 and 10,857.20

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Solution

The fourth proportional to 10,954.40, 16,431.60 and 10,857.20 is: 16,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,954.40 : 16,431.60 = 10,857.20 : x
  2. Step 2: Convert to fraction form
    10,954.40/16,431.60 = 10,857.20/x
  3. Step 3: Cross multiply
    10,954.40x = 16,431.60 × 10,857.20
  4. Step 4: Simplify right side
    10,954.40x = 178,401,167.52
  5. Step 5: Solve for x
    x = 178,401,167.52/10,954.40
  6. Step 6: Final answer
    x = 16,285.80

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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.