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Finding the Fourth Proportional to 18,920.83, 28,381.16 and 5,773.16

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Solution

The fourth proportional to 18,920.83, 28,381.16 and 5,773.16 is: 8,659.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.83 : 28,381.16 = 5,773.16 : x
  2. Step 2: Convert to fraction form
    18,920.83/28,381.16 = 5,773.16/x
  3. Step 3: Cross multiply
    18,920.83x = 28,381.16 × 5,773.16
  4. Step 4: Simplify right side
    18,920.83x = 163,848,850.19
  5. Step 5: Solve for x
    x = 163,848,850.19/18,920.83
  6. Step 6: Final answer
    x = 8,659.71

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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.