Home / 8,115.28-11,199.48-4,971.64

Finding the Fourth Proportional to 8,115.28, 11,199.48 and 4,971.64

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Solution

The fourth proportional to 8,115.28, 11,199.48 and 4,971.64 is: 6,861.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.28 : 11,199.48 = 4,971.64 : x
  2. Step 2: Convert to fraction form
    8,115.28/11,199.48 = 4,971.64/x
  3. Step 3: Cross multiply
    8,115.28x = 11,199.48 × 4,971.64
  4. Step 4: Simplify right side
    8,115.28x = 55,679,782.75
  5. Step 5: Solve for x
    x = 55,679,782.75/8,115.28
  6. Step 6: Final answer
    x = 6,861.10

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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.