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Finding the Fourth Proportional to 13,146.40, 19,719.60 and 13,146.40

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Solution

The fourth proportional to 13,146.40, 19,719.60 and 13,146.40 is: 19,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.40 : 19,719.60 = 13,146.40 : x
  2. Step 2: Convert to fraction form
    13,146.40/19,719.60 = 13,146.40/x
  3. Step 3: Cross multiply
    13,146.40x = 19,719.60 × 13,146.40
  4. Step 4: Simplify right side
    13,146.40x = 259,241,749.44
  5. Step 5: Solve for x
    x = 259,241,749.44/13,146.40
  6. Step 6: Final answer
    x = 19,719.60

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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.