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Finding the Fourth Proportional to 21,890.82, 32,841.42 and 7,099.74

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Solution

The fourth proportional to 21,890.82, 32,841.42 and 7,099.74 is: 10,651.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.82 : 32,841.42 = 7,099.74 : x
  2. Step 2: Convert to fraction form
    21,890.82/32,841.42 = 7,099.74/x
  3. Step 3: Cross multiply
    21,890.82x = 32,841.42 × 7,099.74
  4. Step 4: Simplify right side
    21,890.82x = 233,165,543.23
  5. Step 5: Solve for x
    x = 233,165,543.23/21,890.82
  6. Step 6: Final answer
    x = 10,651.29

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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.