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Finding the Fourth Proportional to 14,975.45, 20,672.75 and 9,672.85

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Solution

The fourth proportional to 14,975.45, 20,672.75 and 9,672.85 is: 13,352.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,975.45 : 20,672.75 = 9,672.85 : x
  2. Step 2: Convert to fraction form
    14,975.45/20,672.75 = 9,672.85/x
  3. Step 3: Cross multiply
    14,975.45x = 20,672.75 × 9,672.85
  4. Step 4: Simplify right side
    14,975.45x = 199,964,409.84
  5. Step 5: Solve for x
    x = 199,964,409.84/14,975.45
  6. Step 6: Final answer
    x = 13,352.81

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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.