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Finding the Fourth Proportional to 43,653.32, 65,479.99 and 12,488.57

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Solution

The fourth proportional to 43,653.32, 65,479.99 and 12,488.57 is: 18,732.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,653.32 : 65,479.99 = 12,488.57 : x
  2. Step 2: Convert to fraction form
    43,653.32/65,479.99 = 12,488.57/x
  3. Step 3: Cross multiply
    43,653.32x = 65,479.99 × 12,488.57
  4. Step 4: Simplify right side
    43,653.32x = 817,751,438.71
  5. Step 5: Solve for x
    x = 817,751,438.71/43,653.32
  6. Step 6: Final answer
    x = 18,732.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.