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Finding the Fourth Proportional to 15,871.73, 21,893.09 and 10,213.86

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Solution

The fourth proportional to 15,871.73, 21,893.09 and 10,213.86 is: 14,088.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.73 : 21,893.09 = 10,213.86 : x
  2. Step 2: Convert to fraction form
    15,871.73/21,893.09 = 10,213.86/x
  3. Step 3: Cross multiply
    15,871.73x = 21,893.09 × 10,213.86
  4. Step 4: Simplify right side
    15,871.73x = 223,612,956.23
  5. Step 5: Solve for x
    x = 223,612,956.23/15,871.73
  6. Step 6: Final answer
    x = 14,088.76

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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.