Home / 28,920.70-43,381.05-8,144.20

Finding the Fourth Proportional to 28,920.70, 43,381.05 and 8,144.20

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Solution

The fourth proportional to 28,920.70, 43,381.05 and 8,144.20 is: 12,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.70 : 43,381.05 = 8,144.20 : x
  2. Step 2: Convert to fraction form
    28,920.70/43,381.05 = 8,144.20/x
  3. Step 3: Cross multiply
    28,920.70x = 43,381.05 × 8,144.20
  4. Step 4: Simplify right side
    28,920.70x = 353,303,947.41
  5. Step 5: Solve for x
    x = 353,303,947.41/28,920.70
  6. Step 6: Final answer
    x = 12,216.30

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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.