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Finding the Fourth Proportional to 18,406.82, 25,402.41 and 10,857.57

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Solution

The fourth proportional to 18,406.82, 25,402.41 and 10,857.57 is: 14,984.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,406.82 : 25,402.41 = 10,857.57 : x
  2. Step 2: Convert to fraction form
    18,406.82/25,402.41 = 10,857.57/x
  3. Step 3: Cross multiply
    18,406.82x = 25,402.41 × 10,857.57
  4. Step 4: Simplify right side
    18,406.82x = 275,808,444.74
  5. Step 5: Solve for x
    x = 275,808,444.74/18,406.82
  6. Step 6: Final answer
    x = 14,984.04

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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.