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Finding the Fourth Proportional to 18,737.66, 25,857.24 and 10,782.45

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Solution

The fourth proportional to 18,737.66, 25,857.24 and 10,782.45 is: 14,879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.66 : 25,857.24 = 10,782.45 : x
  2. Step 2: Convert to fraction form
    18,737.66/25,857.24 = 10,782.45/x
  3. Step 3: Cross multiply
    18,737.66x = 25,857.24 × 10,782.45
  4. Step 4: Simplify right side
    18,737.66x = 278,804,397.44
  5. Step 5: Solve for x
    x = 278,804,397.44/18,737.66
  6. Step 6: Final answer
    x = 14,879.36

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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.