Home / 20,221.57-27,898.72-12,157.62

Finding the Fourth Proportional to 20,221.57, 27,898.72 and 12,157.62

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Solution

The fourth proportional to 20,221.57, 27,898.72 and 12,157.62 is: 16,773.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.57 : 27,898.72 = 12,157.62 : x
  2. Step 2: Convert to fraction form
    20,221.57/27,898.72 = 12,157.62/x
  3. Step 3: Cross multiply
    20,221.57x = 27,898.72 × 12,157.62
  4. Step 4: Simplify right side
    20,221.57x = 339,182,036.25
  5. Step 5: Solve for x
    x = 339,182,036.25/20,221.57
  6. Step 6: Final answer
    x = 16,773.28

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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.