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Finding the Fourth Proportional to 15,481.50, 21,365.78 and 8,768.30

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Solution

The fourth proportional to 15,481.50, 21,365.78 and 8,768.30 is: 12,101.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.50 : 21,365.78 = 8,768.30 : x
  2. Step 2: Convert to fraction form
    15,481.50/21,365.78 = 8,768.30/x
  3. Step 3: Cross multiply
    15,481.50x = 21,365.78 × 8,768.30
  4. Step 4: Simplify right side
    15,481.50x = 187,341,568.77
  5. Step 5: Solve for x
    x = 187,341,568.77/15,481.50
  6. Step 6: Final answer
    x = 12,101.00

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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.