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Finding the Fourth Proportional to 11,712.10, 16,431.50 and 11,712.10

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Solution

The fourth proportional to 11,712.10, 16,431.50 and 11,712.10 is: 16,431.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,712.10 : 16,431.50 = 11,712.10 : x
  2. Step 2: Convert to fraction form
    11,712.10/16,431.50 = 11,712.10/x
  3. Step 3: Cross multiply
    11,712.10x = 16,431.50 × 11,712.10
  4. Step 4: Simplify right side
    11,712.10x = 192,447,371.15
  5. Step 5: Solve for x
    x = 192,447,371.15/11,712.10
  6. Step 6: Final answer
    x = 16,431.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.