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Finding the Fourth Proportional to 27,996.40, 42,004.20 and 12,425.20

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Solution

The fourth proportional to 27,996.40, 42,004.20 and 12,425.20 is: 18,642.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,996.40 : 42,004.20 = 12,425.20 : x
  2. Step 2: Convert to fraction form
    27,996.40/42,004.20 = 12,425.20/x
  3. Step 3: Cross multiply
    27,996.40x = 42,004.20 × 12,425.20
  4. Step 4: Simplify right side
    27,996.40x = 521,910,585.84
  5. Step 5: Solve for x
    x = 521,910,585.84/27,996.40
  6. Step 6: Final answer
    x = 18,642.06

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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.