Home / 28,099.68-42,164.08-20,372.28

Finding the Fourth Proportional to 28,099.68, 42,164.08 and 20,372.28

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Solution

The fourth proportional to 28,099.68, 42,164.08 and 20,372.28 is: 30,568.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,099.68 : 42,164.08 = 20,372.28 : x
  2. Step 2: Convert to fraction form
    28,099.68/42,164.08 = 20,372.28/x
  3. Step 3: Cross multiply
    28,099.68x = 42,164.08 × 20,372.28
  4. Step 4: Simplify right side
    28,099.68x = 858,978,443.70
  5. Step 5: Solve for x
    x = 858,978,443.70/28,099.68
  6. Step 6: Final answer
    x = 30,568.98

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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.