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Finding the Fourth Proportional to 18,673.63, 25,761.51 and 11,115.72

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Solution

The fourth proportional to 18,673.63, 25,761.51 and 11,115.72 is: 15,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,673.63 : 25,761.51 = 11,115.72 : x
  2. Step 2: Convert to fraction form
    18,673.63/25,761.51 = 11,115.72/x
  3. Step 3: Cross multiply
    18,673.63x = 25,761.51 × 11,115.72
  4. Step 4: Simplify right side
    18,673.63x = 286,357,731.94
  5. Step 5: Solve for x
    x = 286,357,731.94/18,673.63
  6. Step 6: Final answer
    x = 15,334.87

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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.