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Finding the Fourth Proportional to 13,590.63, 18,755.10 and 7,929.27

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Solution

The fourth proportional to 13,590.63, 18,755.10 and 7,929.27 is: 10,942.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.63 : 18,755.10 = 7,929.27 : x
  2. Step 2: Convert to fraction form
    13,590.63/18,755.10 = 7,929.27/x
  3. Step 3: Cross multiply
    13,590.63x = 18,755.10 × 7,929.27
  4. Step 4: Simplify right side
    13,590.63x = 148,714,138.18
  5. Step 5: Solve for x
    x = 148,714,138.18/13,590.63
  6. Step 6: Final answer
    x = 10,942.41

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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.