Home / 12,629.12-17,419.20-8,430.08

Finding the Fourth Proportional to 12,629.12, 17,419.20 and 8,430.08

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Solution

The fourth proportional to 12,629.12, 17,419.20 and 8,430.08 is: 11,627.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.12 : 17,419.20 = 8,430.08 : x
  2. Step 2: Convert to fraction form
    12,629.12/17,419.20 = 8,430.08/x
  3. Step 3: Cross multiply
    12,629.12x = 17,419.20 × 8,430.08
  4. Step 4: Simplify right side
    12,629.12x = 146,845,249.54
  5. Step 5: Solve for x
    x = 146,845,249.54/12,629.12
  6. Step 6: Final answer
    x = 11,627.51

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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.