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Finding the Fourth Proportional to 18,892.15, 28,317.44 and 7,792.77

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Solution

The fourth proportional to 18,892.15, 28,317.44 and 7,792.77 is: 11,680.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,892.15 : 28,317.44 = 7,792.77 : x
  2. Step 2: Convert to fraction form
    18,892.15/28,317.44 = 7,792.77/x
  3. Step 3: Cross multiply
    18,892.15x = 28,317.44 × 7,792.77
  4. Step 4: Simplify right side
    18,892.15x = 220,671,296.91
  5. Step 5: Solve for x
    x = 220,671,296.91/18,892.15
  6. Step 6: Final answer
    x = 11,680.58

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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.