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Finding the Fourth Proportional to 18,670.56, 25,754.50 and 11,953.76

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Solution

The fourth proportional to 18,670.56, 25,754.50 and 11,953.76 is: 16,489.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,670.56 : 25,754.50 = 11,953.76 : x
  2. Step 2: Convert to fraction form
    18,670.56/25,754.50 = 11,953.76/x
  3. Step 3: Cross multiply
    18,670.56x = 25,754.50 × 11,953.76
  4. Step 4: Simplify right side
    18,670.56x = 307,863,111.92
  5. Step 5: Solve for x
    x = 307,863,111.92/18,670.56
  6. Step 6: Final answer
    x = 16,489.23

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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.