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Finding the Fourth Proportional to 18,865.79, 28,304.81 and 9,003.78

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Solution

The fourth proportional to 18,865.79, 28,304.81 and 9,003.78 is: 13,508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.79 : 28,304.81 = 9,003.78 : x
  2. Step 2: Convert to fraction form
    18,865.79/28,304.81 = 9,003.78/x
  3. Step 3: Cross multiply
    18,865.79x = 28,304.81 × 9,003.78
  4. Step 4: Simplify right side
    18,865.79x = 254,850,237.16
  5. Step 5: Solve for x
    x = 254,850,237.16/18,865.79
  6. Step 6: Final answer
    x = 13,508.59

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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.