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Finding the Fourth Proportional to 13,590.94, 18,755.53 and 7,929.58

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Solution

The fourth proportional to 13,590.94, 18,755.53 and 7,929.58 is: 10,942.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.94 : 18,755.53 = 7,929.58 : x
  2. Step 2: Convert to fraction form
    13,590.94/18,755.53 = 7,929.58/x
  3. Step 3: Cross multiply
    13,590.94x = 18,755.53 × 7,929.58
  4. Step 4: Simplify right side
    13,590.94x = 148,723,408.86
  5. Step 5: Solve for x
    x = 148,723,408.86/13,590.94
  6. Step 6: Final answer
    x = 10,942.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.