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Finding the Fourth Proportional to 18,709.74, 25,794.63 and 15,510.96

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Solution

The fourth proportional to 18,709.74, 25,794.63 and 15,510.96 is: 21,384.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.74 : 25,794.63 = 15,510.96 : x
  2. Step 2: Convert to fraction form
    18,709.74/25,794.63 = 15,510.96/x
  3. Step 3: Cross multiply
    18,709.74x = 25,794.63 × 15,510.96
  4. Step 4: Simplify right side
    18,709.74x = 400,099,474.14
  5. Step 5: Solve for x
    x = 400,099,474.14/18,709.74
  6. Step 6: Final answer
    x = 21,384.56

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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.