Home / 30,512.77-45,769.19-19,991.54

Finding the Fourth Proportional to 30,512.77, 45,769.19 and 19,991.54

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Solution

The fourth proportional to 30,512.77, 45,769.19 and 19,991.54 is: 29,987.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,512.77 : 45,769.19 = 19,991.54 : x
  2. Step 2: Convert to fraction form
    30,512.77/45,769.19 = 19,991.54/x
  3. Step 3: Cross multiply
    30,512.77x = 45,769.19 × 19,991.54
  4. Step 4: Simplify right side
    30,512.77x = 914,996,607.12
  5. Step 5: Solve for x
    x = 914,996,607.12/30,512.77
  6. Step 6: Final answer
    x = 29,987.34

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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.