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Finding the Fourth Proportional to 51,939.77, 77,909.66 and 12,496.89

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Solution

The fourth proportional to 51,939.77, 77,909.66 and 12,496.89 is: 18,745.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,939.77 : 77,909.66 = 12,496.89 : x
  2. Step 2: Convert to fraction form
    51,939.77/77,909.66 = 12,496.89/x
  3. Step 3: Cross multiply
    51,939.77x = 77,909.66 × 12,496.89
  4. Step 4: Simplify right side
    51,939.77x = 973,628,143.18
  5. Step 5: Solve for x
    x = 973,628,143.18/51,939.77
  6. Step 6: Final answer
    x = 18,745.33

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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.