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Finding the Fourth Proportional to 10,881.72, 15,016.41 and 6,405.44

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Solution

The fourth proportional to 10,881.72, 15,016.41 and 6,405.44 is: 8,839.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.72 : 15,016.41 = 6,405.44 : x
  2. Step 2: Convert to fraction form
    10,881.72/15,016.41 = 6,405.44/x
  3. Step 3: Cross multiply
    10,881.72x = 15,016.41 × 6,405.44
  4. Step 4: Simplify right side
    10,881.72x = 96,186,638.19
  5. Step 5: Solve for x
    x = 96,186,638.19/10,881.72
  6. Step 6: Final answer
    x = 8,839.29

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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.