Home / 28,731.12-43,125.72-20,420.52

Finding the Fourth Proportional to 28,731.12, 43,125.72 and 20,420.52

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Solution

The fourth proportional to 28,731.12, 43,125.72 and 20,420.52 is: 30,651.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.12 : 43,125.72 = 20,420.52 : x
  2. Step 2: Convert to fraction form
    28,731.12/43,125.72 = 20,420.52/x
  3. Step 3: Cross multiply
    28,731.12x = 43,125.72 × 20,420.52
  4. Step 4: Simplify right side
    28,731.12x = 880,649,627.77
  5. Step 5: Solve for x
    x = 880,649,627.77/28,731.12
  6. Step 6: Final answer
    x = 30,651.42

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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.