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Finding the Fourth Proportional to 21,801.50, 30,086.07 and 11,865.50

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Solution

The fourth proportional to 21,801.50, 30,086.07 and 11,865.50 is: 16,374.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,801.50 : 30,086.07 = 11,865.50 : x
  2. Step 2: Convert to fraction form
    21,801.50/30,086.07 = 11,865.50/x
  3. Step 3: Cross multiply
    21,801.50x = 30,086.07 × 11,865.50
  4. Step 4: Simplify right side
    21,801.50x = 356,986,263.59
  5. Step 5: Solve for x
    x = 356,986,263.59/21,801.50
  6. Step 6: Final answer
    x = 16,374.39

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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.