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Finding the Fourth Proportional to 14,975.20, 20,672.42 and 9,672.61

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Solution

The fourth proportional to 14,975.20, 20,672.42 and 9,672.61 is: 13,352.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,975.20 : 20,672.42 = 9,672.61 : x
  2. Step 2: Convert to fraction form
    14,975.20/20,672.42 = 9,672.61/x
  3. Step 3: Cross multiply
    14,975.20x = 20,672.42 × 9,672.61
  4. Step 4: Simplify right side
    14,975.20x = 199,956,153.05
  5. Step 5: Solve for x
    x = 199,956,153.05/14,975.20
  6. Step 6: Final answer
    x = 13,352.49

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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.