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Finding the Fourth Proportional to 12,751.68, 19,128.48 and 3,391.92

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Solution

The fourth proportional to 12,751.68, 19,128.48 and 3,391.92 is: 5,088.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.68 : 19,128.48 = 3,391.92 : x
  2. Step 2: Convert to fraction form
    12,751.68/19,128.48 = 3,391.92/x
  3. Step 3: Cross multiply
    12,751.68x = 19,128.48 × 3,391.92
  4. Step 4: Simplify right side
    12,751.68x = 64,882,273.88
  5. Step 5: Solve for x
    x = 64,882,273.88/12,751.68
  6. Step 6: Final answer
    x = 5,088.14

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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.