Home / 13,171.80-19,725.30-12,588.60

Finding the Fourth Proportional to 13,171.80, 19,725.30 and 12,588.60

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Solution

The fourth proportional to 13,171.80, 19,725.30 and 12,588.60 is: 18,851.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.80 : 19,725.30 = 12,588.60 : x
  2. Step 2: Convert to fraction form
    13,171.80/19,725.30 = 12,588.60/x
  3. Step 3: Cross multiply
    13,171.80x = 19,725.30 × 12,588.60
  4. Step 4: Simplify right side
    13,171.80x = 248,313,911.58
  5. Step 5: Solve for x
    x = 248,313,911.58/13,171.80
  6. Step 6: Final answer
    x = 18,851.93

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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.