Home / 28,661.55-42,984-12,021.12

Finding the Fourth Proportional to 28,661.55, 42,984 and 12,021.12

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Solution

The fourth proportional to 28,661.55, 42,984 and 12,021.12 is: 18,028.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.55 : 42,984 = 12,021.12 : x
  2. Step 2: Convert to fraction form
    28,661.55/42,984 = 12,021.12/x
  3. Step 3: Cross multiply
    28,661.55x = 42,984 × 12,021.12
  4. Step 4: Simplify right side
    28,661.55x = 516,715,822.08
  5. Step 5: Solve for x
    x = 516,715,822.08/28,661.55
  6. Step 6: Final answer
    x = 18,028.19

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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.