Home / 18,712.09-28,051.62-7,628.05

Finding the Fourth Proportional to 18,712.09, 28,051.62 and 7,628.05

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Solution

The fourth proportional to 18,712.09, 28,051.62 and 7,628.05 is: 11,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.09 : 28,051.62 = 7,628.05 : x
  2. Step 2: Convert to fraction form
    18,712.09/28,051.62 = 7,628.05/x
  3. Step 3: Cross multiply
    18,712.09x = 28,051.62 × 7,628.05
  4. Step 4: Simplify right side
    18,712.09x = 213,979,159.94
  5. Step 5: Solve for x
    x = 213,979,159.94/18,712.09
  6. Step 6: Final answer
    x = 11,435.34

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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.