Home / 12,800.88-19,189.92-5,015.12

Finding the Fourth Proportional to 12,800.88, 19,189.92 and 5,015.12

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Solution

The fourth proportional to 12,800.88, 19,189.92 and 5,015.12 is: 7,518.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,800.88 : 19,189.92 = 5,015.12 : x
  2. Step 2: Convert to fraction form
    12,800.88/19,189.92 = 5,015.12/x
  3. Step 3: Cross multiply
    12,800.88x = 19,189.92 × 5,015.12
  4. Step 4: Simplify right side
    12,800.88x = 96,239,751.59
  5. Step 5: Solve for x
    x = 96,239,751.59/12,800.88
  6. Step 6: Final answer
    x = 7,518.21

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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.