Home / 20,289.19-28,016.88-12,748.60

Finding the Fourth Proportional to 20,289.19, 28,016.88 and 12,748.60

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Solution

The fourth proportional to 20,289.19, 28,016.88 and 12,748.60 is: 17,604.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.19 : 28,016.88 = 12,748.60 : x
  2. Step 2: Convert to fraction form
    20,289.19/28,016.88 = 12,748.60/x
  3. Step 3: Cross multiply
    20,289.19x = 28,016.88 × 12,748.60
  4. Step 4: Simplify right side
    20,289.19x = 357,175,996.37
  5. Step 5: Solve for x
    x = 357,175,996.37/20,289.19
  6. Step 6: Final answer
    x = 17,604.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.