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Finding the Fourth Proportional to 12,745.50, 17,588.79 and 7,156.50

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Solution

The fourth proportional to 12,745.50, 17,588.79 and 7,156.50 is: 9,875.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,745.50 : 17,588.79 = 7,156.50 : x
  2. Step 2: Convert to fraction form
    12,745.50/17,588.79 = 7,156.50/x
  3. Step 3: Cross multiply
    12,745.50x = 17,588.79 × 7,156.50
  4. Step 4: Simplify right side
    12,745.50x = 125,874,175.64
  5. Step 5: Solve for x
    x = 125,874,175.64/12,745.50
  6. Step 6: Final answer
    x = 9,875.97

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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.