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Finding the Fourth Proportional to 28,558.79, 42,842.28 and 8,838.89

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Solution

The fourth proportional to 28,558.79, 42,842.28 and 8,838.89 is: 13,259.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,558.79 : 42,842.28 = 8,838.89 : x
  2. Step 2: Convert to fraction form
    28,558.79/42,842.28 = 8,838.89/x
  3. Step 3: Cross multiply
    28,558.79x = 42,842.28 × 8,838.89
  4. Step 4: Simplify right side
    28,558.79x = 378,678,200.27
  5. Step 5: Solve for x
    x = 378,678,200.27/28,558.79
  6. Step 6: Final answer
    x = 13,259.60

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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.