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Finding the Fourth Proportional to 18,406.71, 25,400.39 and 10,447.88

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Solution

The fourth proportional to 18,406.71, 25,400.39 and 10,447.88 is: 14,417.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,406.71 : 25,400.39 = 10,447.88 : x
  2. Step 2: Convert to fraction form
    18,406.71/25,400.39 = 10,447.88/x
  3. Step 3: Cross multiply
    18,406.71x = 25,400.39 × 10,447.88
  4. Step 4: Simplify right side
    18,406.71x = 265,380,047.43
  5. Step 5: Solve for x
    x = 265,380,047.43/18,406.71
  6. Step 6: Final answer
    x = 14,417.57

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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.