Home / 28,917.40-43,376.10-8,140.90

Finding the Fourth Proportional to 28,917.40, 43,376.10 and 8,140.90

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Solution

The fourth proportional to 28,917.40, 43,376.10 and 8,140.90 is: 12,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,917.40 : 43,376.10 = 8,140.90 : x
  2. Step 2: Convert to fraction form
    28,917.40/43,376.10 = 8,140.90/x
  3. Step 3: Cross multiply
    28,917.40x = 43,376.10 × 8,140.90
  4. Step 4: Simplify right side
    28,917.40x = 353,120,492.49
  5. Step 5: Solve for x
    x = 353,120,492.49/28,917.40
  6. Step 6: Final answer
    x = 12,211.35

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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.