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Finding the Fourth Proportional to 17,065.40, 25,554.90 and 13,609.40

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Solution

The fourth proportional to 17,065.40, 25,554.90 and 13,609.40 is: 20,379.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,065.40 : 25,554.90 = 13,609.40 : x
  2. Step 2: Convert to fraction form
    17,065.40/25,554.90 = 13,609.40/x
  3. Step 3: Cross multiply
    17,065.40x = 25,554.90 × 13,609.40
  4. Step 4: Simplify right side
    17,065.40x = 347,786,856.06
  5. Step 5: Solve for x
    x = 347,786,856.06/17,065.40
  6. Step 6: Final answer
    x = 20,379.65

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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.