Home / 30,078.09-45,118.62-7,891.52

Finding the Fourth Proportional to 30,078.09, 45,118.62 and 7,891.52

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Solution

The fourth proportional to 30,078.09, 45,118.62 and 7,891.52 is: 11,837.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,078.09 : 45,118.62 = 7,891.52 : x
  2. Step 2: Convert to fraction form
    30,078.09/45,118.62 = 7,891.52/x
  3. Step 3: Cross multiply
    30,078.09x = 45,118.62 × 7,891.52
  4. Step 4: Simplify right side
    30,078.09x = 356,054,266.51
  5. Step 5: Solve for x
    x = 356,054,266.51/30,078.09
  6. Step 6: Final answer
    x = 11,837.66

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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.