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Finding the Fourth Proportional to 18,780.77, 25,917.80 and 10,282.91

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Solution

The fourth proportional to 18,780.77, 25,917.80 and 10,282.91 is: 14,190.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.77 : 25,917.80 = 10,282.91 : x
  2. Step 2: Convert to fraction form
    18,780.77/25,917.80 = 10,282.91/x
  3. Step 3: Cross multiply
    18,780.77x = 25,917.80 × 10,282.91
  4. Step 4: Simplify right side
    18,780.77x = 266,510,223.79
  5. Step 5: Solve for x
    x = 266,510,223.79/18,780.77
  6. Step 6: Final answer
    x = 14,190.59

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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.