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Finding the Fourth Proportional to 6,487.68, 8,959.58 and 5,589.60

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Solution

The fourth proportional to 6,487.68, 8,959.58 and 5,589.60 is: 7,719.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.68 : 8,959.58 = 5,589.60 : x
  2. Step 2: Convert to fraction form
    6,487.68/8,959.58 = 5,589.60/x
  3. Step 3: Cross multiply
    6,487.68x = 8,959.58 × 5,589.60
  4. Step 4: Simplify right side
    6,487.68x = 50,080,468.37
  5. Step 5: Solve for x
    x = 50,080,468.37/6,487.68
  6. Step 6: Final answer
    x = 7,719.32

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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.