Home / 12,619.80-17,415.20-7,242.01

Finding the Fourth Proportional to 12,619.80, 17,415.20 and 7,242.01

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Solution

The fourth proportional to 12,619.80, 17,415.20 and 7,242.01 is: 9,993.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.80 : 17,415.20 = 7,242.01 : x
  2. Step 2: Convert to fraction form
    12,619.80/17,415.20 = 7,242.01/x
  3. Step 3: Cross multiply
    12,619.80x = 17,415.20 × 7,242.01
  4. Step 4: Simplify right side
    12,619.80x = 126,121,027.12
  5. Step 5: Solve for x
    x = 126,121,027.12/12,619.80
  6. Step 6: Final answer
    x = 9,993.90

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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.