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Finding the Fourth Proportional to 8,756.64, 13,114.80 and 5,286.24

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Solution

The fourth proportional to 8,756.64, 13,114.80 and 5,286.24 is: 7,917.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.64 : 13,114.80 = 5,286.24 : x
  2. Step 2: Convert to fraction form
    8,756.64/13,114.80 = 5,286.24/x
  3. Step 3: Cross multiply
    8,756.64x = 13,114.80 × 5,286.24
  4. Step 4: Simplify right side
    8,756.64x = 69,327,980.35
  5. Step 5: Solve for x
    x = 69,327,980.35/8,756.64
  6. Step 6: Final answer
    x = 7,917.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.