Home / 12,720.21-19,078.13-3,360.33

Finding the Fourth Proportional to 12,720.21, 19,078.13 and 3,360.33

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Solution

The fourth proportional to 12,720.21, 19,078.13 and 3,360.33 is: 5,039.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.21 : 19,078.13 = 3,360.33 : x
  2. Step 2: Convert to fraction form
    12,720.21/19,078.13 = 3,360.33/x
  3. Step 3: Cross multiply
    12,720.21x = 19,078.13 × 3,360.33
  4. Step 4: Simplify right side
    12,720.21x = 64,108,795.78
  5. Step 5: Solve for x
    x = 64,108,795.78/12,720.21
  6. Step 6: Final answer
    x = 5,039.92

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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.