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Finding the Fourth Proportional to 18,752.67, 28,129.04 and 7,659.36

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Solution

The fourth proportional to 18,752.67, 28,129.04 and 7,659.36 is: 11,489.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.67 : 28,129.04 = 7,659.36 : x
  2. Step 2: Convert to fraction form
    18,752.67/28,129.04 = 7,659.36/x
  3. Step 3: Cross multiply
    18,752.67x = 28,129.04 × 7,659.36
  4. Step 4: Simplify right side
    18,752.67x = 215,450,443.81
  5. Step 5: Solve for x
    x = 215,450,443.81/18,752.67
  6. Step 6: Final answer
    x = 11,489.05

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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.