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Finding the Fourth Proportional to 18,710.87, 25,796.18 and 15,512.09

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Solution

The fourth proportional to 18,710.87, 25,796.18 and 15,512.09 is: 21,386.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.87 : 25,796.18 = 15,512.09 : x
  2. Step 2: Convert to fraction form
    18,710.87/25,796.18 = 15,512.09/x
  3. Step 3: Cross multiply
    18,710.87x = 25,796.18 × 15,512.09
  4. Step 4: Simplify right side
    18,710.87x = 400,152,575.62
  5. Step 5: Solve for x
    x = 400,152,575.62/18,710.87
  6. Step 6: Final answer
    x = 21,386.11

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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.