Home / 13,419.80-18,519.36-7,451.48

Finding the Fourth Proportional to 13,419.80, 18,519.36 and 7,451.48

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Solution

The fourth proportional to 13,419.80, 18,519.36 and 7,451.48 is: 10,283.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.80 : 18,519.36 = 7,451.48 : x
  2. Step 2: Convert to fraction form
    13,419.80/18,519.36 = 7,451.48/x
  3. Step 3: Cross multiply
    13,419.80x = 18,519.36 × 7,451.48
  4. Step 4: Simplify right side
    13,419.80x = 137,996,640.65
  5. Step 5: Solve for x
    x = 137,996,640.65/13,419.80
  6. Step 6: Final answer
    x = 10,283.06

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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.