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Finding the Fourth Proportional to 18,439, 25,447.74 and 11,365.24

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Solution

The fourth proportional to 18,439, 25,447.74 and 11,365.24 is: 15,685.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439 : 25,447.74 = 11,365.24 : x
  2. Step 2: Convert to fraction form
    18,439/25,447.74 = 11,365.24/x
  3. Step 3: Cross multiply
    18,439x = 25,447.74 × 11,365.24
  4. Step 4: Simplify right side
    18,439x = 289,219,672.56
  5. Step 5: Solve for x
    x = 289,219,672.56/18,439
  6. Step 6: Final answer
    x = 15,685.21

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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.