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Finding the Fourth Proportional to 13,515.87, 18,652.64 and 7,926.87

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Solution

The fourth proportional to 13,515.87, 18,652.64 and 7,926.87 is: 10,939.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.87 : 18,652.64 = 7,926.87 : x
  2. Step 2: Convert to fraction form
    13,515.87/18,652.64 = 7,926.87/x
  3. Step 3: Cross multiply
    13,515.87x = 18,652.64 × 7,926.87
  4. Step 4: Simplify right side
    13,515.87x = 147,857,012.80
  5. Step 5: Solve for x
    x = 147,857,012.80/13,515.87
  6. Step 6: Final answer
    x = 10,939.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.