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Finding the Fourth Proportional to 28,950.40, 43,429.65 and 12,310.30

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Solution

The fourth proportional to 28,950.40, 43,429.65 and 12,310.30 is: 18,467.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,950.40 : 43,429.65 = 12,310.30 : x
  2. Step 2: Convert to fraction form
    28,950.40/43,429.65 = 12,310.30/x
  3. Step 3: Cross multiply
    28,950.40x = 43,429.65 × 12,310.30
  4. Step 4: Simplify right side
    28,950.40x = 534,632,020.40
  5. Step 5: Solve for x
    x = 534,632,020.40/28,950.40
  6. Step 6: Final answer
    x = 18,467.17

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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.