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Finding the Fourth Proportional to 21,890.84, 32,841.44 and 7,099.76

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Solution

The fourth proportional to 21,890.84, 32,841.44 and 7,099.76 is: 10,651.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.84 : 32,841.44 = 7,099.76 : x
  2. Step 2: Convert to fraction form
    21,890.84/32,841.44 = 7,099.76/x
  3. Step 3: Cross multiply
    21,890.84x = 32,841.44 × 7,099.76
  4. Step 4: Simplify right side
    21,890.84x = 233,166,342.05
  5. Step 5: Solve for x
    x = 233,166,342.05/21,890.84
  6. Step 6: Final answer
    x = 10,651.32

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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.