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Finding the Fourth Proportional to 13,806.56, 19,070.21 and 13,599.20

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Solution

The fourth proportional to 13,806.56, 19,070.21 and 13,599.20 is: 18,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,806.56 : 19,070.21 = 13,599.20 : x
  2. Step 2: Convert to fraction form
    13,806.56/19,070.21 = 13,599.20/x
  3. Step 3: Cross multiply
    13,806.56x = 19,070.21 × 13,599.20
  4. Step 4: Simplify right side
    13,806.56x = 259,339,599.83
  5. Step 5: Solve for x
    x = 259,339,599.83/13,806.56
  6. Step 6: Final answer
    x = 18,783.80

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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.