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Finding the Fourth Proportional to 17,128.12, 25,713.06 and 9,738.40

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Solution

The fourth proportional to 17,128.12, 25,713.06 and 9,738.40 is: 14,619.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,128.12 : 25,713.06 = 9,738.40 : x
  2. Step 2: Convert to fraction form
    17,128.12/25,713.06 = 9,738.40/x
  3. Step 3: Cross multiply
    17,128.12x = 25,713.06 × 9,738.40
  4. Step 4: Simplify right side
    17,128.12x = 250,404,063.50
  5. Step 5: Solve for x
    x = 250,404,063.50/17,128.12
  6. Step 6: Final answer
    x = 14,619.47

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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.