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Finding the Fourth Proportional to 10,613.88, 15,921.83 and 4,374.31

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Solution

The fourth proportional to 10,613.88, 15,921.83 and 4,374.31 is: 6,561.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,613.88 : 15,921.83 = 4,374.31 : x
  2. Step 2: Convert to fraction form
    10,613.88/15,921.83 = 4,374.31/x
  3. Step 3: Cross multiply
    10,613.88x = 15,921.83 × 4,374.31
  4. Step 4: Simplify right side
    10,613.88x = 69,647,020.19
  5. Step 5: Solve for x
    x = 69,647,020.19/10,613.88
  6. Step 6: Final answer
    x = 6,561.88

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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.