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Finding the Fourth Proportional to 30,439.71, 45,664.69 and 9,379.13

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Solution

The fourth proportional to 30,439.71, 45,664.69 and 9,379.13 is: 14,070.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.71 : 45,664.69 = 9,379.13 : x
  2. Step 2: Convert to fraction form
    30,439.71/45,664.69 = 9,379.13/x
  3. Step 3: Cross multiply
    30,439.71x = 45,664.69 × 9,379.13
  4. Step 4: Simplify right side
    30,439.71x = 428,295,063.92
  5. Step 5: Solve for x
    x = 428,295,063.92/30,439.71
  6. Step 6: Final answer
    x = 14,070.27

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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.