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Finding the Fourth Proportional to 12,647.61, 18,961.16 and 11,263.64

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Solution

The fourth proportional to 12,647.61, 18,961.16 and 11,263.64 is: 16,886.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.61 : 18,961.16 = 11,263.64 : x
  2. Step 2: Convert to fraction form
    12,647.61/18,961.16 = 11,263.64/x
  3. Step 3: Cross multiply
    12,647.61x = 18,961.16 × 11,263.64
  4. Step 4: Simplify right side
    12,647.61x = 213,571,529.10
  5. Step 5: Solve for x
    x = 213,571,529.10/12,647.61
  6. Step 6: Final answer
    x = 16,886.32

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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.