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Finding the Fourth Proportional to 28,404.66, 42,613.08 and 8,682.57

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Solution

The fourth proportional to 28,404.66, 42,613.08 and 8,682.57 is: 13,025.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.66 : 42,613.08 = 8,682.57 : x
  2. Step 2: Convert to fraction form
    28,404.66/42,613.08 = 8,682.57/x
  3. Step 3: Cross multiply
    28,404.66x = 42,613.08 × 8,682.57
  4. Step 4: Simplify right side
    28,404.66x = 369,991,050.02
  5. Step 5: Solve for x
    x = 369,991,050.02/28,404.66
  6. Step 6: Final answer
    x = 13,025.72

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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.