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Finding the Fourth Proportional to 39,803.87, 54,929.33 and 21,900.03

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Solution

The fourth proportional to 39,803.87, 54,929.33 and 21,900.03 is: 30,222.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,803.87 : 54,929.33 = 21,900.03 : x
  2. Step 2: Convert to fraction form
    39,803.87/54,929.33 = 21,900.03/x
  3. Step 3: Cross multiply
    39,803.87x = 54,929.33 × 21,900.03
  4. Step 4: Simplify right side
    39,803.87x = 1,202,953,865.38
  5. Step 5: Solve for x
    x = 1,202,953,865.38/39,803.87
  6. Step 6: Final answer
    x = 30,222.04

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1.5x scale

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.