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Finding the Fourth Proportional to 28,139.38, 42,209.46 and 7,362.88

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Solution

The fourth proportional to 28,139.38, 42,209.46 and 7,362.88 is: 11,044.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.38 : 42,209.46 = 7,362.88 : x
  2. Step 2: Convert to fraction form
    28,139.38/42,209.46 = 7,362.88/x
  3. Step 3: Cross multiply
    28,139.38x = 42,209.46 × 7,362.88
  4. Step 4: Simplify right side
    28,139.38x = 310,783,188.84
  5. Step 5: Solve for x
    x = 310,783,188.84/28,139.38
  6. Step 6: Final answer
    x = 11,044.42

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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.