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Finding the Fourth Proportional to 6,954.45, 10,381.09 and 6,440.51

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Solution

The fourth proportional to 6,954.45, 10,381.09 and 6,440.51 is: 9,613.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,954.45 : 10,381.09 = 6,440.51 : x
  2. Step 2: Convert to fraction form
    6,954.45/10,381.09 = 6,440.51/x
  3. Step 3: Cross multiply
    6,954.45x = 10,381.09 × 6,440.51
  4. Step 4: Simplify right side
    6,954.45x = 66,859,513.96
  5. Step 5: Solve for x
    x = 66,859,513.96/6,954.45
  6. Step 6: Final answer
    x = 9,613.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.