Home / 15,189.05-20,961.38-8,815.16

Finding the Fourth Proportional to 15,189.05, 20,961.38 and 8,815.16

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Solution

The fourth proportional to 15,189.05, 20,961.38 and 8,815.16 is: 12,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189.05 : 20,961.38 = 8,815.16 : x
  2. Step 2: Convert to fraction form
    15,189.05/20,961.38 = 8,815.16/x
  3. Step 3: Cross multiply
    15,189.05x = 20,961.38 × 8,815.16
  4. Step 4: Simplify right side
    15,189.05x = 184,777,835.75
  5. Step 5: Solve for x
    x = 184,777,835.75/15,189.05
  6. Step 6: Final answer
    x = 12,165.20

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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.