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Finding the Fourth Proportional to 12,615.63, 17,283.49 and 12,142.68

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Solution

The fourth proportional to 12,615.63, 17,283.49 and 12,142.68 is: 16,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.63 : 17,283.49 = 12,142.68 : x
  2. Step 2: Convert to fraction form
    12,615.63/17,283.49 = 12,142.68/x
  3. Step 3: Cross multiply
    12,615.63x = 17,283.49 × 12,142.68
  4. Step 4: Simplify right side
    12,615.63x = 209,867,888.35
  5. Step 5: Solve for x
    x = 209,867,888.35/12,615.63
  6. Step 6: Final answer
    x = 16,635.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.