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Finding the Fourth Proportional to 18,827.19, 25,978.82 and 11,271.71

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Solution

The fourth proportional to 18,827.19, 25,978.82 and 11,271.71 is: 15,553.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,827.19 : 25,978.82 = 11,271.71 : x
  2. Step 2: Convert to fraction form
    18,827.19/25,978.82 = 11,271.71/x
  3. Step 3: Cross multiply
    18,827.19x = 25,978.82 × 11,271.71
  4. Step 4: Simplify right side
    18,827.19x = 292,825,725.18
  5. Step 5: Solve for x
    x = 292,825,725.18/18,827.19
  6. Step 6: Final answer
    x = 15,553.34

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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.