Home / 11,947.20-17,920.80-4,150.50

Finding the Fourth Proportional to 11,947.20, 17,920.80 and 4,150.50

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Solution

The fourth proportional to 11,947.20, 17,920.80 and 4,150.50 is: 6,225.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.20 : 17,920.80 = 4,150.50 : x
  2. Step 2: Convert to fraction form
    11,947.20/17,920.80 = 4,150.50/x
  3. Step 3: Cross multiply
    11,947.20x = 17,920.80 × 4,150.50
  4. Step 4: Simplify right side
    11,947.20x = 74,380,280.40
  5. Step 5: Solve for x
    x = 74,380,280.40/11,947.20
  6. Step 6: Final answer
    x = 6,225.75

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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.