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Finding the Fourth Proportional to 20,273.49, 30,425.90 and 10,421.37

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Solution

The fourth proportional to 20,273.49, 30,425.90 and 10,421.37 is: 15,640.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,273.49 : 30,425.90 = 10,421.37 : x
  2. Step 2: Convert to fraction form
    20,273.49/30,425.90 = 10,421.37/x
  3. Step 3: Cross multiply
    20,273.49x = 30,425.90 × 10,421.37
  4. Step 4: Simplify right side
    20,273.49x = 317,079,509.38
  5. Step 5: Solve for x
    x = 317,079,509.38/20,273.49
  6. Step 6: Final answer
    x = 15,640.10

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1.5x scale

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.