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Finding the Fourth Proportional to 28,618.75, 42,934.67 and 9,898.77

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Solution

The fourth proportional to 28,618.75, 42,934.67 and 9,898.77 is: 14,850.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.75 : 42,934.67 = 9,898.77 : x
  2. Step 2: Convert to fraction form
    28,618.75/42,934.67 = 9,898.77/x
  3. Step 3: Cross multiply
    28,618.75x = 42,934.67 × 9,898.77
  4. Step 4: Simplify right side
    28,618.75x = 425,000,606.79
  5. Step 5: Solve for x
    x = 425,000,606.79/28,618.75
  6. Step 6: Final answer
    x = 14,850.42

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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.