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Finding the Fourth Proportional to 28,635.78, 42,953.01 and 9,914.69

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Solution

The fourth proportional to 28,635.78, 42,953.01 and 9,914.69 is: 14,871.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,635.78 : 42,953.01 = 9,914.69 : x
  2. Step 2: Convert to fraction form
    28,635.78/42,953.01 = 9,914.69/x
  3. Step 3: Cross multiply
    28,635.78x = 42,953.01 × 9,914.69
  4. Step 4: Simplify right side
    28,635.78x = 425,865,563.95
  5. Step 5: Solve for x
    x = 425,865,563.95/28,635.78
  6. Step 6: Final answer
    x = 14,871.80

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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.