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Finding the Fourth Proportional to 13,211.40, 19,817.10 and 8,027.40

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Solution

The fourth proportional to 13,211.40, 19,817.10 and 8,027.40 is: 12,041.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.40 : 19,817.10 = 8,027.40 : x
  2. Step 2: Convert to fraction form
    13,211.40/19,817.10 = 8,027.40/x
  3. Step 3: Cross multiply
    13,211.40x = 19,817.10 × 8,027.40
  4. Step 4: Simplify right side
    13,211.40x = 159,079,788.54
  5. Step 5: Solve for x
    x = 159,079,788.54/13,211.40
  6. Step 6: Final answer
    x = 12,041.10

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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.