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Finding the Fourth Proportional to 28,247.58, 42,371.62 and 7,187.65

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Solution

The fourth proportional to 28,247.58, 42,371.62 and 7,187.65 is: 10,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,247.58 : 42,371.62 = 7,187.65 : x
  2. Step 2: Convert to fraction form
    28,247.58/42,371.62 = 7,187.65/x
  3. Step 3: Cross multiply
    28,247.58x = 42,371.62 × 7,187.65
  4. Step 4: Simplify right side
    28,247.58x = 304,552,374.49
  5. Step 5: Solve for x
    x = 304,552,374.49/28,247.58
  6. Step 6: Final answer
    x = 10,781.54

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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.