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Finding the Fourth Proportional to 18,515.71, 25,525.10 and 13,201.30

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Solution

The fourth proportional to 18,515.71, 25,525.10 and 13,201.30 is: 18,198.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.71 : 25,525.10 = 13,201.30 : x
  2. Step 2: Convert to fraction form
    18,515.71/25,525.10 = 13,201.30/x
  3. Step 3: Cross multiply
    18,515.71x = 25,525.10 × 13,201.30
  4. Step 4: Simplify right side
    18,515.71x = 336,964,502.63
  5. Step 5: Solve for x
    x = 336,964,502.63/18,515.71
  6. Step 6: Final answer
    x = 18,198.84

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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.