Home / 13,980.84-20,970.12-4,119.96

Finding the Fourth Proportional to 13,980.84, 20,970.12 and 4,119.96

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Solution

The fourth proportional to 13,980.84, 20,970.12 and 4,119.96 is: 6,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.84 : 20,970.12 = 4,119.96 : x
  2. Step 2: Convert to fraction form
    13,980.84/20,970.12 = 4,119.96/x
  3. Step 3: Cross multiply
    13,980.84x = 20,970.12 × 4,119.96
  4. Step 4: Simplify right side
    13,980.84x = 86,396,055.60
  5. Step 5: Solve for x
    x = 86,396,055.60/13,980.84
  6. Step 6: Final answer
    x = 6,179.60

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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.