Home / 20,814.60-31,219.31-12,270.95

Finding the Fourth Proportional to 20,814.60, 31,219.31 and 12,270.95

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Solution

The fourth proportional to 20,814.60, 31,219.31 and 12,270.95 is: 18,404.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.60 : 31,219.31 = 12,270.95 : x
  2. Step 2: Convert to fraction form
    20,814.60/31,219.31 = 12,270.95/x
  3. Step 3: Cross multiply
    20,814.60x = 31,219.31 × 12,270.95
  4. Step 4: Simplify right side
    20,814.60x = 383,090,592.04
  5. Step 5: Solve for x
    x = 383,090,592.04/20,814.60
  6. Step 6: Final answer
    x = 18,404.90

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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.