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Finding the Fourth Proportional to 18,461.55, 27,686.41 and 7,928.72

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Solution

The fourth proportional to 18,461.55, 27,686.41 and 7,928.72 is: 11,890.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.55 : 27,686.41 = 7,928.72 : x
  2. Step 2: Convert to fraction form
    18,461.55/27,686.41 = 7,928.72/x
  3. Step 3: Cross multiply
    18,461.55x = 27,686.41 × 7,928.72
  4. Step 4: Simplify right side
    18,461.55x = 219,517,738.27
  5. Step 5: Solve for x
    x = 219,517,738.27/18,461.55
  6. Step 6: Final answer
    x = 11,890.53

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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.