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Finding the Fourth Proportional to 18,752.92, 28,118.72 and 7,646.60

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Solution

The fourth proportional to 18,752.92, 28,118.72 and 7,646.60 is: 11,465.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.92 : 28,118.72 = 7,646.60 : x
  2. Step 2: Convert to fraction form
    18,752.92/28,118.72 = 7,646.60/x
  3. Step 3: Cross multiply
    18,752.92x = 28,118.72 × 7,646.60
  4. Step 4: Simplify right side
    18,752.92x = 215,012,604.35
  5. Step 5: Solve for x
    x = 215,012,604.35/18,752.92
  6. Step 6: Final answer
    x = 11,465.55

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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.