Home / 20,208.21-27,885.90-12,654.19

Finding the Fourth Proportional to 20,208.21, 27,885.90 and 12,654.19

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Solution

The fourth proportional to 20,208.21, 27,885.90 and 12,654.19 is: 17,461.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,208.21 : 27,885.90 = 12,654.19 : x
  2. Step 2: Convert to fraction form
    20,208.21/27,885.90 = 12,654.19/x
  3. Step 3: Cross multiply
    20,208.21x = 27,885.90 × 12,654.19
  4. Step 4: Simplify right side
    20,208.21x = 352,873,476.92
  5. Step 5: Solve for x
    x = 352,873,476.92/20,208.21
  6. Step 6: Final answer
    x = 17,461.89

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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.