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Finding the Fourth Proportional to 7,522.78, 10,381.41 and 4,210.78

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Solution

The fourth proportional to 7,522.78, 10,381.41 and 4,210.78 is: 5,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,522.78 : 10,381.41 = 4,210.78 : x
  2. Step 2: Convert to fraction form
    7,522.78/10,381.41 = 4,210.78/x
  3. Step 3: Cross multiply
    7,522.78x = 10,381.41 × 4,210.78
  4. Step 4: Simplify right side
    7,522.78x = 43,713,833.60
  5. Step 5: Solve for x
    x = 43,713,833.60/7,522.78
  6. Step 6: Final answer
    x = 5,810.86

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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.