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Finding the Fourth Proportional to 18,741.68, 28,112.52 and 7,653.59

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Solution

The fourth proportional to 18,741.68, 28,112.52 and 7,653.59 is: 11,480.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,741.68 : 28,112.52 = 7,653.59 : x
  2. Step 2: Convert to fraction form
    18,741.68/28,112.52 = 7,653.59/x
  3. Step 3: Cross multiply
    18,741.68x = 28,112.52 × 7,653.59
  4. Step 4: Simplify right side
    18,741.68x = 215,161,701.95
  5. Step 5: Solve for x
    x = 215,161,701.95/18,741.68
  6. Step 6: Final answer
    x = 11,480.39

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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.