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Finding the Fourth Proportional to 18,689.86, 25,790.83 and 10,726.48

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Solution

The fourth proportional to 18,689.86, 25,790.83 and 10,726.48 is: 14,801.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.86 : 25,790.83 = 10,726.48 : x
  2. Step 2: Convert to fraction form
    18,689.86/25,790.83 = 10,726.48/x
  3. Step 3: Cross multiply
    18,689.86x = 25,790.83 × 10,726.48
  4. Step 4: Simplify right side
    18,689.86x = 276,644,822.18
  5. Step 5: Solve for x
    x = 276,644,822.18/18,689.86
  6. Step 6: Final answer
    x = 14,801.87

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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.