Home / 30,287.31-45,383.72-19,170.51

Finding the Fourth Proportional to 30,287.31, 45,383.72 and 19,170.51

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Solution

The fourth proportional to 30,287.31, 45,383.72 and 19,170.51 is: 28,725.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,287.31 : 45,383.72 = 19,170.51 : x
  2. Step 2: Convert to fraction form
    30,287.31/45,383.72 = 19,170.51/x
  3. Step 3: Cross multiply
    30,287.31x = 45,383.72 × 19,170.51
  4. Step 4: Simplify right side
    30,287.31x = 870,029,058.10
  5. Step 5: Solve for x
    x = 870,029,058.10/30,287.31
  6. Step 6: Final answer
    x = 28,725.86

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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.