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Finding the Fourth Proportional to 21,696.80, 32,543.82 and 6,916.32

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Solution

The fourth proportional to 21,696.80, 32,543.82 and 6,916.32 is: 10,374.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,696.80 : 32,543.82 = 6,916.32 : x
  2. Step 2: Convert to fraction form
    21,696.80/32,543.82 = 6,916.32/x
  3. Step 3: Cross multiply
    21,696.80x = 32,543.82 × 6,916.32
  4. Step 4: Simplify right side
    21,696.80x = 225,083,473.14
  5. Step 5: Solve for x
    x = 225,083,473.14/21,696.80
  6. Step 6: Final answer
    x = 10,374.04

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1.5x scale

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.