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Finding the Fourth Proportional to 28,501, 42,754.92 and 11,872.30

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Solution

The fourth proportional to 28,501, 42,754.92 and 11,872.30 is: 17,809.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,501 : 42,754.92 = 11,872.30 : x
  2. Step 2: Convert to fraction form
    28,501/42,754.92 = 11,872.30/x
  3. Step 3: Cross multiply
    28,501x = 42,754.92 × 11,872.30
  4. Step 4: Simplify right side
    28,501x = 507,599,236.72
  5. Step 5: Solve for x
    x = 507,599,236.72/28,501
  6. Step 6: Final answer
    x = 17,809.87

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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.