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Finding the Fourth Proportional to 28,820.63, 39,773.07 and 16,245.38

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Solution

The fourth proportional to 28,820.63, 39,773.07 and 16,245.38 is: 22,418.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,820.63 : 39,773.07 = 16,245.38 : x
  2. Step 2: Convert to fraction form
    28,820.63/39,773.07 = 16,245.38/x
  3. Step 3: Cross multiply
    28,820.63x = 39,773.07 × 16,245.38
  4. Step 4: Simplify right side
    28,820.63x = 646,128,437.05
  5. Step 5: Solve for x
    x = 646,128,437.05/28,820.63
  6. Step 6: Final answer
    x = 22,418.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.