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Finding the Fourth Proportional to 21,709.38, 32,563.71 and 6,918.10

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Solution

The fourth proportional to 21,709.38, 32,563.71 and 6,918.10 is: 10,377.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.38 : 32,563.71 = 6,918.10 : x
  2. Step 2: Convert to fraction form
    21,709.38/32,563.71 = 6,918.10/x
  3. Step 3: Cross multiply
    21,709.38x = 32,563.71 × 6,918.10
  4. Step 4: Simplify right side
    21,709.38x = 225,278,804.74
  5. Step 5: Solve for x
    x = 225,278,804.74/21,709.38
  6. Step 6: Final answer
    x = 10,377.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.