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Finding the Fourth Proportional to 18,778.16, 25,917.27 and 10,712.99

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Solution

The fourth proportional to 18,778.16, 25,917.27 and 10,712.99 is: 14,785.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.16 : 25,917.27 = 10,712.99 : x
  2. Step 2: Convert to fraction form
    18,778.16/25,917.27 = 10,712.99/x
  3. Step 3: Cross multiply
    18,778.16x = 25,917.27 × 10,712.99
  4. Step 4: Simplify right side
    18,778.16x = 277,651,478.96
  5. Step 5: Solve for x
    x = 277,651,478.96/18,778.16
  6. Step 6: Final answer
    x = 14,785.87

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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.