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Finding the Fourth Proportional to 39,803.67, 54,929.07 and 21,898.29

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Solution

The fourth proportional to 39,803.67, 54,929.07 and 21,898.29 is: 30,219.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,803.67 : 54,929.07 = 21,898.29 : x
  2. Step 2: Convert to fraction form
    39,803.67/54,929.07 = 21,898.29/x
  3. Step 3: Cross multiply
    39,803.67x = 54,929.07 × 21,898.29
  4. Step 4: Simplify right side
    39,803.67x = 1,202,852,766.45
  5. Step 5: Solve for x
    x = 1,202,852,766.45/39,803.67
  6. Step 6: Final answer
    x = 30,219.64

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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.