Home / 30,322.30-45,428.03-21,981.63

Finding the Fourth Proportional to 30,322.30, 45,428.03 and 21,981.63

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Solution

The fourth proportional to 30,322.30, 45,428.03 and 21,981.63 is: 32,932.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,322.30 : 45,428.03 = 21,981.63 : x
  2. Step 2: Convert to fraction form
    30,322.30/45,428.03 = 21,981.63/x
  3. Step 3: Cross multiply
    30,322.30x = 45,428.03 × 21,981.63
  4. Step 4: Simplify right side
    30,322.30x = 998,582,147.09
  5. Step 5: Solve for x
    x = 998,582,147.09/30,322.30
  6. Step 6: Final answer
    x = 32,932.27

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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.