Home / 30,154.65-45,227.79-21,121.41

Finding the Fourth Proportional to 30,154.65, 45,227.79 and 21,121.41

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Solution

The fourth proportional to 30,154.65, 45,227.79 and 21,121.41 is: 31,679.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,154.65 : 45,227.79 = 21,121.41 : x
  2. Step 2: Convert to fraction form
    30,154.65/45,227.79 = 21,121.41/x
  3. Step 3: Cross multiply
    30,154.65x = 45,227.79 × 21,121.41
  4. Step 4: Simplify right side
    30,154.65x = 955,274,695.98
  5. Step 5: Solve for x
    x = 955,274,695.98/30,154.65
  6. Step 6: Final answer
    x = 31,679.18

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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.