Home / 28,910.21-43,372.17-9,188.78

Finding the Fourth Proportional to 28,910.21, 43,372.17 and 9,188.78

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Solution

The fourth proportional to 28,910.21, 43,372.17 and 9,188.78 is: 13,785.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.21 : 43,372.17 = 9,188.78 : x
  2. Step 2: Convert to fraction form
    28,910.21/43,372.17 = 9,188.78/x
  3. Step 3: Cross multiply
    28,910.21x = 43,372.17 × 9,188.78
  4. Step 4: Simplify right side
    28,910.21x = 398,537,328.25
  5. Step 5: Solve for x
    x = 398,537,328.25/28,910.21
  6. Step 6: Final answer
    x = 13,785.35

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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.