Home / 30,678.11-45,989.49-21,322.54

Finding the Fourth Proportional to 30,678.11, 45,989.49 and 21,322.54

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Solution

The fourth proportional to 30,678.11, 45,989.49 and 21,322.54 is: 31,964.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,678.11 : 45,989.49 = 21,322.54 : x
  2. Step 2: Convert to fraction form
    30,678.11/45,989.49 = 21,322.54/x
  3. Step 3: Cross multiply
    30,678.11x = 45,989.49 × 21,322.54
  4. Step 4: Simplify right side
    30,678.11x = 980,612,403.54
  5. Step 5: Solve for x
    x = 980,612,403.54/30,678.11
  6. Step 6: Final answer
    x = 31,964.56

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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.