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Finding the Fourth Proportional to 12,485.81, 18,708.74 and 8,744.64

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Solution

The fourth proportional to 12,485.81, 18,708.74 and 8,744.64 is: 13,102.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.81 : 18,708.74 = 8,744.64 : x
  2. Step 2: Convert to fraction form
    12,485.81/18,708.74 = 8,744.64/x
  3. Step 3: Cross multiply
    12,485.81x = 18,708.74 × 8,744.64
  4. Step 4: Simplify right side
    12,485.81x = 163,601,196.15
  5. Step 5: Solve for x
    x = 163,601,196.15/12,485.81
  6. Step 6: Final answer
    x = 13,102.98

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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.