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Finding the Fourth Proportional to 18,892.75, 28,340.30 and 5,746.09

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Solution

The fourth proportional to 18,892.75, 28,340.30 and 5,746.09 is: 8,619.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,892.75 : 28,340.30 = 5,746.09 : x
  2. Step 2: Convert to fraction form
    18,892.75/28,340.30 = 5,746.09/x
  3. Step 3: Cross multiply
    18,892.75x = 28,340.30 × 5,746.09
  4. Step 4: Simplify right side
    18,892.75x = 162,845,885.70
  5. Step 5: Solve for x
    x = 162,845,885.70/18,892.75
  6. Step 6: Final answer
    x = 8,619.49

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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.