Home / 20,220.57-27,897.35-12,156.62

Finding the Fourth Proportional to 20,220.57, 27,897.35 and 12,156.62

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Solution

The fourth proportional to 20,220.57, 27,897.35 and 12,156.62 is: 16,771.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.57 : 27,897.35 = 12,156.62 : x
  2. Step 2: Convert to fraction form
    20,220.57/27,897.35 = 12,156.62/x
  3. Step 3: Cross multiply
    20,220.57x = 27,897.35 × 12,156.62
  4. Step 4: Simplify right side
    20,220.57x = 339,137,282.69
  5. Step 5: Solve for x
    x = 339,137,282.69/20,220.57
  6. Step 6: Final answer
    x = 16,771.90

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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.