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Finding the Fourth Proportional to 28,513.90, 42,766.80 and 9,794.80

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Solution

The fourth proportional to 28,513.90, 42,766.80 and 9,794.80 is: 14,690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.90 : 42,766.80 = 9,794.80 : x
  2. Step 2: Convert to fraction form
    28,513.90/42,766.80 = 9,794.80/x
  3. Step 3: Cross multiply
    28,513.90x = 42,766.80 × 9,794.80
  4. Step 4: Simplify right side
    28,513.90x = 418,892,252.64
  5. Step 5: Solve for x
    x = 418,892,252.64/28,513.90
  6. Step 6: Final answer
    x = 14,690.81

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1.5x scale

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.