Home / 39,709.65-54,799.14-21,805

Finding the Fourth Proportional to 39,709.65, 54,799.14 and 21,805

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Solution

The fourth proportional to 39,709.65, 54,799.14 and 21,805 is: 30,090.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,709.65 : 54,799.14 = 21,805 : x
  2. Step 2: Convert to fraction form
    39,709.65/54,799.14 = 21,805/x
  3. Step 3: Cross multiply
    39,709.65x = 54,799.14 × 21,805
  4. Step 4: Simplify right side
    39,709.65x = 1,194,895,247.70
  5. Step 5: Solve for x
    x = 1,194,895,247.70/39,709.65
  6. Step 6: Final answer
    x = 30,090.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.