Home / 13,118.49-18,102.99-7,150.03

Finding the Fourth Proportional to 13,118.49, 18,102.99 and 7,150.03

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Solution

The fourth proportional to 13,118.49, 18,102.99 and 7,150.03 is: 9,866.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.49 : 18,102.99 = 7,150.03 : x
  2. Step 2: Convert to fraction form
    13,118.49/18,102.99 = 7,150.03/x
  3. Step 3: Cross multiply
    13,118.49x = 18,102.99 × 7,150.03
  4. Step 4: Simplify right side
    13,118.49x = 129,436,921.59
  5. Step 5: Solve for x
    x = 129,436,921.59/13,118.49
  6. Step 6: Final answer
    x = 9,866.75

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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.