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Finding the Fourth Proportional to 8,515.80, 11,750.04 and 5,157.96

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Solution

The fourth proportional to 8,515.80, 11,750.04 and 5,157.96 is: 7,116.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.80 : 11,750.04 = 5,157.96 : x
  2. Step 2: Convert to fraction form
    8,515.80/11,750.04 = 5,157.96/x
  3. Step 3: Cross multiply
    8,515.80x = 11,750.04 × 5,157.96
  4. Step 4: Simplify right side
    8,515.80x = 60,606,236.32
  5. Step 5: Solve for x
    x = 60,606,236.32/8,515.80
  6. Step 6: Final answer
    x = 7,116.92

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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.