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Finding the Fourth Proportional to 6,613.28, 9,919.80 and 1,615.69

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Solution

The fourth proportional to 6,613.28, 9,919.80 and 1,615.69 is: 2,423.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.28 : 9,919.80 = 1,615.69 : x
  2. Step 2: Convert to fraction form
    6,613.28/9,919.80 = 1,615.69/x
  3. Step 3: Cross multiply
    6,613.28x = 9,919.80 × 1,615.69
  4. Step 4: Simplify right side
    6,613.28x = 16,027,305.43
  5. Step 5: Solve for x
    x = 16,027,305.43/6,613.28
  6. Step 6: Final answer
    x = 2,423.50

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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.