Home / 20,697.95-31,023.83-8,214.64

Finding the Fourth Proportional to 20,697.95, 31,023.83 and 8,214.64

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Solution

The fourth proportional to 20,697.95, 31,023.83 and 8,214.64 is: 12,312.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.95 : 31,023.83 = 8,214.64 : x
  2. Step 2: Convert to fraction form
    20,697.95/31,023.83 = 8,214.64/x
  3. Step 3: Cross multiply
    20,697.95x = 31,023.83 × 8,214.64
  4. Step 4: Simplify right side
    20,697.95x = 254,849,537.85
  5. Step 5: Solve for x
    x = 254,849,537.85/20,697.95
  6. Step 6: Final answer
    x = 12,312.79

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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.