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Finding the Fourth Proportional to 10,954.96, 15,116.97 and 6,478.90

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Solution

The fourth proportional to 10,954.96, 15,116.97 and 6,478.90 is: 8,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,954.96 : 15,116.97 = 6,478.90 : x
  2. Step 2: Convert to fraction form
    10,954.96/15,116.97 = 6,478.90/x
  3. Step 3: Cross multiply
    10,954.96x = 15,116.97 × 6,478.90
  4. Step 4: Simplify right side
    10,954.96x = 97,941,336.93
  5. Step 5: Solve for x
    x = 97,941,336.93/10,954.96
  6. Step 6: Final answer
    x = 8,940.36

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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.