Home / 19,147.88-28,720.28-12,107.36

Finding the Fourth Proportional to 19,147.88, 28,720.28 and 12,107.36

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Solution

The fourth proportional to 19,147.88, 28,720.28 and 12,107.36 is: 18,160.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,147.88 : 28,720.28 = 12,107.36 : x
  2. Step 2: Convert to fraction form
    19,147.88/28,720.28 = 12,107.36/x
  3. Step 3: Cross multiply
    19,147.88x = 28,720.28 × 12,107.36
  4. Step 4: Simplify right side
    19,147.88x = 347,726,769.26
  5. Step 5: Solve for x
    x = 347,726,769.26/19,147.88
  6. Step 6: Final answer
    x = 18,160.07

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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.