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Finding the Fourth Proportional to 18,779.76, 28,150.17 and 11,743.62

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Solution

The fourth proportional to 18,779.76, 28,150.17 and 11,743.62 is: 17,603.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.76 : 28,150.17 = 11,743.62 : x
  2. Step 2: Convert to fraction form
    18,779.76/28,150.17 = 11,743.62/x
  3. Step 3: Cross multiply
    18,779.76x = 28,150.17 × 11,743.62
  4. Step 4: Simplify right side
    18,779.76x = 330,585,053.39
  5. Step 5: Solve for x
    x = 330,585,053.39/18,779.76
  6. Step 6: Final answer
    x = 17,603.26

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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.