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Finding the Fourth Proportional to 13,800.56, 20,600.74 and 12,772.64

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Solution

The fourth proportional to 13,800.56, 20,600.74 and 12,772.64 is: 19,066.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.56 : 20,600.74 = 12,772.64 : x
  2. Step 2: Convert to fraction form
    13,800.56/20,600.74 = 12,772.64/x
  3. Step 3: Cross multiply
    13,800.56x = 20,600.74 × 12,772.64
  4. Step 4: Simplify right side
    13,800.56x = 263,125,835.75
  5. Step 5: Solve for x
    x = 263,125,835.75/13,800.56
  6. Step 6: Final answer
    x = 19,066.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.