Home / 9,905.65-13,669.78-5,713.90

Finding the Fourth Proportional to 9,905.65, 13,669.78 and 5,713.90

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Solution

The fourth proportional to 9,905.65, 13,669.78 and 5,713.90 is: 7,885.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.65 : 13,669.78 = 5,713.90 : x
  2. Step 2: Convert to fraction form
    9,905.65/13,669.78 = 5,713.90/x
  3. Step 3: Cross multiply
    9,905.65x = 13,669.78 × 5,713.90
  4. Step 4: Simplify right side
    9,905.65x = 78,107,755.94
  5. Step 5: Solve for x
    x = 78,107,755.94/9,905.65
  6. Step 6: Final answer
    x = 7,885.17

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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.