Home / 20,678.18-31,027.53-8,197.94

Finding the Fourth Proportional to 20,678.18, 31,027.53 and 8,197.94

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Solution

The fourth proportional to 20,678.18, 31,027.53 and 8,197.94 is: 12,300.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.18 : 31,027.53 = 8,197.94 : x
  2. Step 2: Convert to fraction form
    20,678.18/31,027.53 = 8,197.94/x
  3. Step 3: Cross multiply
    20,678.18x = 31,027.53 × 8,197.94
  4. Step 4: Simplify right side
    20,678.18x = 254,361,829.29
  5. Step 5: Solve for x
    x = 254,361,829.29/20,678.18
  6. Step 6: Final answer
    x = 12,300.98

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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.