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Finding the Fourth Proportional to 21,703.28, 32,554.92 and 6,916.74

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Solution

The fourth proportional to 21,703.28, 32,554.92 and 6,916.74 is: 10,375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.28 : 32,554.92 = 6,916.74 : x
  2. Step 2: Convert to fraction form
    21,703.28/32,554.92 = 6,916.74/x
  3. Step 3: Cross multiply
    21,703.28x = 32,554.92 × 6,916.74
  4. Step 4: Simplify right side
    21,703.28x = 225,173,917.36
  5. Step 5: Solve for x
    x = 225,173,917.36/21,703.28
  6. Step 6: Final answer
    x = 10,375.11

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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.