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Finding the Fourth Proportional to 28,503, 42,769.08 and 12,712.86

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Solution

The fourth proportional to 28,503, 42,769.08 and 12,712.86 is: 19,075.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,503 : 42,769.08 = 12,712.86 : x
  2. Step 2: Convert to fraction form
    28,503/42,769.08 = 12,712.86/x
  3. Step 3: Cross multiply
    28,503x = 42,769.08 × 12,712.86
  4. Step 4: Simplify right side
    28,503x = 543,717,326.37
  5. Step 5: Solve for x
    x = 543,717,326.37/28,503
  6. Step 6: Final answer
    x = 19,075.79

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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.