Home / 15,180.72-20,949.50-8,811.12

Finding the Fourth Proportional to 15,180.72, 20,949.50 and 8,811.12

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Solution

The fourth proportional to 15,180.72, 20,949.50 and 8,811.12 is: 12,159.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,180.72 : 20,949.50 = 8,811.12 : x
  2. Step 2: Convert to fraction form
    15,180.72/20,949.50 = 8,811.12/x
  3. Step 3: Cross multiply
    15,180.72x = 20,949.50 × 8,811.12
  4. Step 4: Simplify right side
    15,180.72x = 184,588,579.25
  5. Step 5: Solve for x
    x = 184,588,579.25/15,180.72
  6. Step 6: Final answer
    x = 12,159.41

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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.