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Finding the Fourth Proportional to 18,708.90, 27,917.09 and 18,264.30

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Solution

The fourth proportional to 18,708.90, 27,917.09 and 18,264.30 is: 27,253.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.90 : 27,917.09 = 18,264.30 : x
  2. Step 2: Convert to fraction form
    18,708.90/27,917.09 = 18,264.30/x
  3. Step 3: Cross multiply
    18,708.90x = 27,917.09 × 18,264.30
  4. Step 4: Simplify right side
    18,708.90x = 509,886,015.57
  5. Step 5: Solve for x
    x = 509,886,015.57/18,708.90
  6. Step 6: Final answer
    x = 27,253.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.