Home / 30,037.21-45,055.54-21,115.73

Finding the Fourth Proportional to 30,037.21, 45,055.54 and 21,115.73

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Solution

The fourth proportional to 30,037.21, 45,055.54 and 21,115.73 is: 31,673.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,037.21 : 45,055.54 = 21,115.73 : x
  2. Step 2: Convert to fraction form
    30,037.21/45,055.54 = 21,115.73/x
  3. Step 3: Cross multiply
    30,037.21x = 45,055.54 × 21,115.73
  4. Step 4: Simplify right side
    30,037.21x = 951,380,756.68
  5. Step 5: Solve for x
    x = 951,380,756.68/30,037.21
  6. Step 6: Final answer
    x = 31,673.41

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Double scale
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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.