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Finding the Fourth Proportional to 26,453.25, 39,679.88 and 7,985.25

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Solution

The fourth proportional to 26,453.25, 39,679.88 and 7,985.25 is: 11,977.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,453.25 : 39,679.88 = 7,985.25 : x
  2. Step 2: Convert to fraction form
    26,453.25/39,679.88 = 7,985.25/x
  3. Step 3: Cross multiply
    26,453.25x = 39,679.88 × 7,985.25
  4. Step 4: Simplify right side
    26,453.25x = 316,853,721.84
  5. Step 5: Solve for x
    x = 316,853,721.84/26,453.25
  6. Step 6: Final answer
    x = 11,977.88

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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.