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Finding the Fourth Proportional to 15,838.86, 21,858.21 and 10,249.86

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Solution

The fourth proportional to 15,838.86, 21,858.21 and 10,249.86 is: 14,145.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,838.86 : 21,858.21 = 10,249.86 : x
  2. Step 2: Convert to fraction form
    15,838.86/21,858.21 = 10,249.86/x
  3. Step 3: Cross multiply
    15,838.86x = 21,858.21 × 10,249.86
  4. Step 4: Simplify right side
    15,838.86x = 224,043,592.35
  5. Step 5: Solve for x
    x = 224,043,592.35/15,838.86
  6. Step 6: Final answer
    x = 14,145.18

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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.