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Finding the Fourth Proportional to 18,812.76, 25,961.64 and 10,429.26

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Solution

The fourth proportional to 18,812.76, 25,961.64 and 10,429.26 is: 14,392.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.76 : 25,961.64 = 10,429.26 : x
  2. Step 2: Convert to fraction form
    18,812.76/25,961.64 = 10,429.26/x
  3. Step 3: Cross multiply
    18,812.76x = 25,961.64 × 10,429.26
  4. Step 4: Simplify right side
    18,812.76x = 270,760,693.59
  5. Step 5: Solve for x
    x = 270,760,693.59/18,812.76
  6. Step 6: Final answer
    x = 14,392.40

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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.