Home / 21,428.93-32,151.84-6,638.99

Finding the Fourth Proportional to 21,428.93, 32,151.84 and 6,638.99

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Solution

The fourth proportional to 21,428.93, 32,151.84 and 6,638.99 is: 9,961.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.93 : 32,151.84 = 6,638.99 : x
  2. Step 2: Convert to fraction form
    21,428.93/32,151.84 = 6,638.99/x
  3. Step 3: Cross multiply
    21,428.93x = 32,151.84 × 6,638.99
  4. Step 4: Simplify right side
    21,428.93x = 213,455,824.62
  5. Step 5: Solve for x
    x = 213,455,824.62/21,428.93
  6. Step 6: Final answer
    x = 9,961.11

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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.