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Finding the Fourth Proportional to 17,205.40, 25,764.90 and 13,749.40

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Solution

The fourth proportional to 17,205.40, 25,764.90 and 13,749.40 is: 20,589.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,205.40 : 25,764.90 = 13,749.40 : x
  2. Step 2: Convert to fraction form
    17,205.40/25,764.90 = 13,749.40/x
  3. Step 3: Cross multiply
    17,205.40x = 25,764.90 × 13,749.40
  4. Step 4: Simplify right side
    17,205.40x = 354,251,916.06
  5. Step 5: Solve for x
    x = 354,251,916.06/17,205.40
  6. Step 6: Final answer
    x = 20,589.58

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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.