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Finding the Fourth Proportional to 18,759.24, 28,128.48 and 7,673.72

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Solution

The fourth proportional to 18,759.24, 28,128.48 and 7,673.72 is: 11,506.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.24 : 28,128.48 = 7,673.72 : x
  2. Step 2: Convert to fraction form
    18,759.24/28,128.48 = 7,673.72/x
  3. Step 3: Cross multiply
    18,759.24x = 28,128.48 × 7,673.72
  4. Step 4: Simplify right side
    18,759.24x = 215,849,960.47
  5. Step 5: Solve for x
    x = 215,849,960.47/18,759.24
  6. Step 6: Final answer
    x = 11,506.33

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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.