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Finding the Fourth Proportional to 28,559.81, 42,841.78 and 8,835.84

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Solution

The fourth proportional to 28,559.81, 42,841.78 and 8,835.84 is: 13,254.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,559.81 : 42,841.78 = 8,835.84 : x
  2. Step 2: Convert to fraction form
    28,559.81/42,841.78 = 8,835.84/x
  3. Step 3: Cross multiply
    28,559.81x = 42,841.78 × 8,835.84
  4. Step 4: Simplify right side
    28,559.81x = 378,543,091.31
  5. Step 5: Solve for x
    x = 378,543,091.31/28,559.81
  6. Step 6: Final answer
    x = 13,254.40

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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.