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Finding the Fourth Proportional to 12,654.48, 18,999.72 and 7,106.88

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Solution

The fourth proportional to 12,654.48, 18,999.72 and 7,106.88 is: 10,670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.48 : 18,999.72 = 7,106.88 : x
  2. Step 2: Convert to fraction form
    12,654.48/18,999.72 = 7,106.88/x
  3. Step 3: Cross multiply
    12,654.48x = 18,999.72 × 7,106.88
  4. Step 4: Simplify right side
    12,654.48x = 135,028,730.07
  5. Step 5: Solve for x
    x = 135,028,730.07/12,654.48
  6. Step 6: Final answer
    x = 10,670.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.