Home / 20,589.41-28,420.05-12,091.31

Finding the Fourth Proportional to 20,589.41, 28,420.05 and 12,091.31

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Solution

The fourth proportional to 20,589.41, 28,420.05 and 12,091.31 is: 16,689.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.41 : 28,420.05 = 12,091.31 : x
  2. Step 2: Convert to fraction form
    20,589.41/28,420.05 = 12,091.31/x
  3. Step 3: Cross multiply
    20,589.41x = 28,420.05 × 12,091.31
  4. Step 4: Simplify right side
    20,589.41x = 343,635,576.57
  5. Step 5: Solve for x
    x = 343,635,576.57/20,589.41
  6. Step 6: Final answer
    x = 16,689.92

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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.