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Finding the Fourth Proportional to 6,687.60, 10,012.80 and 5,039.08

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Solution

The fourth proportional to 6,687.60, 10,012.80 and 5,039.08 is: 7,544.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.60 : 10,012.80 = 5,039.08 : x
  2. Step 2: Convert to fraction form
    6,687.60/10,012.80 = 5,039.08/x
  3. Step 3: Cross multiply
    6,687.60x = 10,012.80 × 5,039.08
  4. Step 4: Simplify right side
    6,687.60x = 50,455,300.22
  5. Step 5: Solve for x
    x = 50,455,300.22/6,687.60
  6. Step 6: Final answer
    x = 7,544.60

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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.