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Finding the Fourth Proportional to 11,433.96, 15,781.92 and 6,721.38

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Solution

The fourth proportional to 11,433.96, 15,781.92 and 6,721.38 is: 9,277.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,433.96 : 15,781.92 = 6,721.38 : x
  2. Step 2: Convert to fraction form
    11,433.96/15,781.92 = 6,721.38/x
  3. Step 3: Cross multiply
    11,433.96x = 15,781.92 × 6,721.38
  4. Step 4: Simplify right side
    11,433.96x = 106,076,281.45
  5. Step 5: Solve for x
    x = 106,076,281.45/11,433.96
  6. Step 6: Final answer
    x = 9,277.30

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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.