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Finding the Fourth Proportional to 18,782.76, 28,154.67 and 11,746.62

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Solution

The fourth proportional to 18,782.76, 28,154.67 and 11,746.62 is: 17,607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.76 : 28,154.67 = 11,746.62 : x
  2. Step 2: Convert to fraction form
    18,782.76/28,154.67 = 11,746.62/x
  3. Step 3: Cross multiply
    18,782.76x = 28,154.67 × 11,746.62
  4. Step 4: Simplify right side
    18,782.76x = 330,722,209.72
  5. Step 5: Solve for x
    x = 330,722,209.72/18,782.76
  6. Step 6: Final answer
    x = 17,607.75

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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.