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Finding the Fourth Proportional to 20,944.60, 28,900.06 and 13,880.60

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Solution

The fourth proportional to 20,944.60, 28,900.06 and 13,880.60 is: 19,152.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,944.60 : 28,900.06 = 13,880.60 : x
  2. Step 2: Convert to fraction form
    20,944.60/28,900.06 = 13,880.60/x
  3. Step 3: Cross multiply
    20,944.60x = 28,900.06 × 13,880.60
  4. Step 4: Simplify right side
    20,944.60x = 401,150,172.84
  5. Step 5: Solve for x
    x = 401,150,172.84/20,944.60
  6. Step 6: Final answer
    x = 19,152.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.