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Finding the Fourth Proportional to 18,785.58, 25,919.65 and 11,124.98

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Solution

The fourth proportional to 18,785.58, 25,919.65 and 11,124.98 is: 15,349.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.58 : 25,919.65 = 11,124.98 : x
  2. Step 2: Convert to fraction form
    18,785.58/25,919.65 = 11,124.98/x
  3. Step 3: Cross multiply
    18,785.58x = 25,919.65 × 11,124.98
  4. Step 4: Simplify right side
    18,785.58x = 288,355,624.84
  5. Step 5: Solve for x
    x = 288,355,624.84/18,785.58
  6. Step 6: Final answer
    x = 15,349.84

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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.