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Finding the Fourth Proportional to 14,503.78, 20,016.48 and 8,215.75

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Solution

The fourth proportional to 14,503.78, 20,016.48 and 8,215.75 is: 11,338.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,503.78 : 20,016.48 = 8,215.75 : x
  2. Step 2: Convert to fraction form
    14,503.78/20,016.48 = 8,215.75/x
  3. Step 3: Cross multiply
    14,503.78x = 20,016.48 × 8,215.75
  4. Step 4: Simplify right side
    14,503.78x = 164,450,395.56
  5. Step 5: Solve for x
    x = 164,450,395.56/14,503.78
  6. Step 6: Final answer
    x = 11,338.45

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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.