Home / 11,220.20-15,483.87-6,507.21

Finding the Fourth Proportional to 11,220.20, 15,483.87 and 6,507.21

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Solution

The fourth proportional to 11,220.20, 15,483.87 and 6,507.21 is: 8,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.20 : 15,483.87 = 6,507.21 : x
  2. Step 2: Convert to fraction form
    11,220.20/15,483.87 = 6,507.21/x
  3. Step 3: Cross multiply
    11,220.20x = 15,483.87 × 6,507.21
  4. Step 4: Simplify right side
    11,220.20x = 100,756,793.70
  5. Step 5: Solve for x
    x = 100,756,793.70/11,220.20
  6. Step 6: Final answer
    x = 8,979.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.