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Finding the Fourth Proportional to 18,776.52, 25,881.30 and 12,724.74

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Solution

The fourth proportional to 18,776.52, 25,881.30 and 12,724.74 is: 17,539.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.52 : 25,881.30 = 12,724.74 : x
  2. Step 2: Convert to fraction form
    18,776.52/25,881.30 = 12,724.74/x
  3. Step 3: Cross multiply
    18,776.52x = 25,881.30 × 12,724.74
  4. Step 4: Simplify right side
    18,776.52x = 329,332,813.36
  5. Step 5: Solve for x
    x = 329,332,813.36/18,776.52
  6. Step 6: Final answer
    x = 17,539.61

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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.