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Finding the Fourth Proportional to 18,993.81, 28,488.06 and 6,513.63

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Solution

The fourth proportional to 18,993.81, 28,488.06 and 6,513.63 is: 9,769.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.81 : 28,488.06 = 6,513.63 : x
  2. Step 2: Convert to fraction form
    18,993.81/28,488.06 = 6,513.63/x
  3. Step 3: Cross multiply
    18,993.81x = 28,488.06 × 6,513.63
  4. Step 4: Simplify right side
    18,993.81x = 185,560,682.26
  5. Step 5: Solve for x
    x = 185,560,682.26/18,993.81
  6. Step 6: Final answer
    x = 9,769.53

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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.