Home / 20,274.81-27,977.72-12,720.75

Finding the Fourth Proportional to 20,274.81, 27,977.72 and 12,720.75

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Solution

The fourth proportional to 20,274.81, 27,977.72 and 12,720.75 is: 17,553.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274.81 : 27,977.72 = 12,720.75 : x
  2. Step 2: Convert to fraction form
    20,274.81/27,977.72 = 12,720.75/x
  3. Step 3: Cross multiply
    20,274.81x = 27,977.72 × 12,720.75
  4. Step 4: Simplify right side
    20,274.81x = 355,897,518.09
  5. Step 5: Solve for x
    x = 355,897,518.09/20,274.81
  6. Step 6: Final answer
    x = 17,553.68

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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.