Home / 12,728.40-19,106.57-10,112.72

Finding the Fourth Proportional to 12,728.40, 19,106.57 and 10,112.72

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Solution

The fourth proportional to 12,728.40, 19,106.57 and 10,112.72 is: 15,180.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.40 : 19,106.57 = 10,112.72 : x
  2. Step 2: Convert to fraction form
    12,728.40/19,106.57 = 10,112.72/x
  3. Step 3: Cross multiply
    12,728.40x = 19,106.57 × 10,112.72
  4. Step 4: Simplify right side
    12,728.40x = 193,219,392.57
  5. Step 5: Solve for x
    x = 193,219,392.57/12,728.40
  6. Step 6: Final answer
    x = 15,180.18

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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.