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Finding the Fourth Proportional to 6,613.76, 9,920.64 and 5,154.01

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Solution

The fourth proportional to 6,613.76, 9,920.64 and 5,154.01 is: 7,731.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.76 : 9,920.64 = 5,154.01 : x
  2. Step 2: Convert to fraction form
    6,613.76/9,920.64 = 5,154.01/x
  3. Step 3: Cross multiply
    6,613.76x = 9,920.64 × 5,154.01
  4. Step 4: Simplify right side
    6,613.76x = 51,131,072.29
  5. Step 5: Solve for x
    x = 51,131,072.29/6,613.76
  6. Step 6: Final answer
    x = 7,731.01

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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.