Home / 28,919.20-43,378.80-8,142.70

Finding the Fourth Proportional to 28,919.20, 43,378.80 and 8,142.70

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Solution

The fourth proportional to 28,919.20, 43,378.80 and 8,142.70 is: 12,214.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.20 : 43,378.80 = 8,142.70 : x
  2. Step 2: Convert to fraction form
    28,919.20/43,378.80 = 8,142.70/x
  3. Step 3: Cross multiply
    28,919.20x = 43,378.80 × 8,142.70
  4. Step 4: Simplify right side
    28,919.20x = 353,220,554.76
  5. Step 5: Solve for x
    x = 353,220,554.76/28,919.20
  6. Step 6: Final answer
    x = 12,214.05

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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.