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Finding the Fourth Proportional to 12,613.32, 18,920.31 and 3,848.21

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Solution

The fourth proportional to 12,613.32, 18,920.31 and 3,848.21 is: 5,772.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.32 : 18,920.31 = 3,848.21 : x
  2. Step 2: Convert to fraction form
    12,613.32/18,920.31 = 3,848.21/x
  3. Step 3: Cross multiply
    12,613.32x = 18,920.31 × 3,848.21
  4. Step 4: Simplify right side
    12,613.32x = 72,809,288.06
  5. Step 5: Solve for x
    x = 72,809,288.06/12,613.32
  6. Step 6: Final answer
    x = 5,772.41

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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.