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Finding the Fourth Proportional to 18,853.44, 28,254.65 and 7,160.28

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Solution

The fourth proportional to 18,853.44, 28,254.65 and 7,160.28 is: 10,730.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,853.44 : 28,254.65 = 7,160.28 : x
  2. Step 2: Convert to fraction form
    18,853.44/28,254.65 = 7,160.28/x
  3. Step 3: Cross multiply
    18,853.44x = 28,254.65 × 7,160.28
  4. Step 4: Simplify right side
    18,853.44x = 202,311,169.50
  5. Step 5: Solve for x
    x = 202,311,169.50/18,853.44
  6. Step 6: Final answer
    x = 10,730.73

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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.