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Finding the Fourth Proportional to 18,702.99, 25,785.27 and 15,504.30

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Solution

The fourth proportional to 18,702.99, 25,785.27 and 15,504.30 is: 21,375.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.99 : 25,785.27 = 15,504.30 : x
  2. Step 2: Convert to fraction form
    18,702.99/25,785.27 = 15,504.30/x
  3. Step 3: Cross multiply
    18,702.99x = 25,785.27 × 15,504.30
  4. Step 4: Simplify right side
    18,702.99x = 399,782,561.66
  5. Step 5: Solve for x
    x = 399,782,561.66/18,702.99
  6. Step 6: Final answer
    x = 21,375.33

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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.