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Finding the Fourth Proportional to 14,585.87, 20,128.03 and 8,212.79

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Solution

The fourth proportional to 14,585.87, 20,128.03 and 8,212.79 is: 11,333.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,585.87 : 20,128.03 = 8,212.79 : x
  2. Step 2: Convert to fraction form
    14,585.87/20,128.03 = 8,212.79/x
  3. Step 3: Cross multiply
    14,585.87x = 20,128.03 × 8,212.79
  4. Step 4: Simplify right side
    14,585.87x = 165,307,283.50
  5. Step 5: Solve for x
    x = 165,307,283.50/14,585.87
  6. Step 6: Final answer
    x = 11,333.39

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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.