Home / 28,679.31-43,002.57-11,128.65

Finding the Fourth Proportional to 28,679.31, 43,002.57 and 11,128.65

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Solution

The fourth proportional to 28,679.31, 43,002.57 and 11,128.65 is: 16,686.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.31 : 43,002.57 = 11,128.65 : x
  2. Step 2: Convert to fraction form
    28,679.31/43,002.57 = 11,128.65/x
  3. Step 3: Cross multiply
    28,679.31x = 43,002.57 × 11,128.65
  4. Step 4: Simplify right side
    28,679.31x = 478,560,550.63
  5. Step 5: Solve for x
    x = 478,560,550.63/28,679.31
  6. Step 6: Final answer
    x = 16,686.61

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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.