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Finding the Fourth Proportional to 18,965.82, 28,443.46 and 5,641.74

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Solution

The fourth proportional to 18,965.82, 28,443.46 and 5,641.74 is: 8,461.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.82 : 28,443.46 = 5,641.74 : x
  2. Step 2: Convert to fraction form
    18,965.82/28,443.46 = 5,641.74/x
  3. Step 3: Cross multiply
    18,965.82x = 28,443.46 × 5,641.74
  4. Step 4: Simplify right side
    18,965.82x = 160,470,606.02
  5. Step 5: Solve for x
    x = 160,470,606.02/18,965.82
  6. Step 6: Final answer
    x = 8,461.04

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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.