Home / 28,679.34-43,002.54-11,128.68

Finding the Fourth Proportional to 28,679.34, 43,002.54 and 11,128.68

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Solution

The fourth proportional to 28,679.34, 43,002.54 and 11,128.68 is: 16,686.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.34 : 43,002.54 = 11,128.68 : x
  2. Step 2: Convert to fraction form
    28,679.34/43,002.54 = 11,128.68/x
  3. Step 3: Cross multiply
    28,679.34x = 43,002.54 × 11,128.68
  4. Step 4: Simplify right side
    28,679.34x = 478,561,506.85
  5. Step 5: Solve for x
    x = 478,561,506.85/28,679.34
  6. Step 6: Final answer
    x = 16,686.63

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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.