Home / 20,840.22-31,257.90-8,359.74

Finding the Fourth Proportional to 20,840.22, 31,257.90 and 8,359.74

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Solution

The fourth proportional to 20,840.22, 31,257.90 and 8,359.74 is: 12,538.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.22 : 31,257.90 = 8,359.74 : x
  2. Step 2: Convert to fraction form
    20,840.22/31,257.90 = 8,359.74/x
  3. Step 3: Cross multiply
    20,840.22x = 31,257.90 × 8,359.74
  4. Step 4: Simplify right side
    20,840.22x = 261,307,916.95
  5. Step 5: Solve for x
    x = 261,307,916.95/20,840.22
  6. Step 6: Final answer
    x = 12,538.64

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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.