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Finding the Fourth Proportional to 12,887.01, 19,331.94 and 7,886.94

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Solution

The fourth proportional to 12,887.01, 19,331.94 and 7,886.94 is: 11,831.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.01 : 19,331.94 = 7,886.94 : x
  2. Step 2: Convert to fraction form
    12,887.01/19,331.94 = 7,886.94/x
  3. Step 3: Cross multiply
    12,887.01x = 19,331.94 × 7,886.94
  4. Step 4: Simplify right side
    12,887.01x = 152,469,850.86
  5. Step 5: Solve for x
    x = 152,469,850.86/12,887.01
  6. Step 6: Final answer
    x = 11,831.28

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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.