Home / 13,318.49-19,980.80-3,958.31

Finding the Fourth Proportional to 13,318.49, 19,980.80 and 3,958.31

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Solution

The fourth proportional to 13,318.49, 19,980.80 and 3,958.31 is: 5,938.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.49 : 19,980.80 = 3,958.31 : x
  2. Step 2: Convert to fraction form
    13,318.49/19,980.80 = 3,958.31/x
  3. Step 3: Cross multiply
    13,318.49x = 19,980.80 × 3,958.31
  4. Step 4: Simplify right side
    13,318.49x = 79,090,080.75
  5. Step 5: Solve for x
    x = 79,090,080.75/13,318.49
  6. Step 6: Final answer
    x = 5,938.37

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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.