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Finding the Fourth Proportional to 15,604.86, 21,520.68 and 10,305

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Solution

The fourth proportional to 15,604.86, 21,520.68 and 10,305 is: 14,211.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,604.86 : 21,520.68 = 10,305 : x
  2. Step 2: Convert to fraction form
    15,604.86/21,520.68 = 10,305/x
  3. Step 3: Cross multiply
    15,604.86x = 21,520.68 × 10,305
  4. Step 4: Simplify right side
    15,604.86x = 221,770,607.40
  5. Step 5: Solve for x
    x = 221,770,607.40/15,604.86
  6. Step 6: Final answer
    x = 14,211.64

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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.