Home / 20,037.78-30,001.14-10,128.60

Finding the Fourth Proportional to 20,037.78, 30,001.14 and 10,128.60

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Solution

The fourth proportional to 20,037.78, 30,001.14 and 10,128.60 is: 15,164.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,037.78 : 30,001.14 = 10,128.60 : x
  2. Step 2: Convert to fraction form
    20,037.78/30,001.14 = 10,128.60/x
  3. Step 3: Cross multiply
    20,037.78x = 30,001.14 × 10,128.60
  4. Step 4: Simplify right side
    20,037.78x = 303,869,546.60
  5. Step 5: Solve for x
    x = 303,869,546.60/20,037.78
  6. Step 6: Final answer
    x = 15,164.83

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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.