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Finding the Fourth Proportional to 43,653.20, 65,479.80 and 12,488.46

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Solution

The fourth proportional to 43,653.20, 65,479.80 and 12,488.46 is: 18,732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,653.20 : 65,479.80 = 12,488.46 : x
  2. Step 2: Convert to fraction form
    43,653.20/65,479.80 = 12,488.46/x
  3. Step 3: Cross multiply
    43,653.20x = 65,479.80 × 12,488.46
  4. Step 4: Simplify right side
    43,653.20x = 817,741,863.11
  5. Step 5: Solve for x
    x = 817,741,863.11/43,653.20
  6. Step 6: Final answer
    x = 18,732.69

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1.5x scale

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.