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Finding the Fourth Proportional to 12,689.41, 19,034.12 and 3,924.13

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Solution

The fourth proportional to 12,689.41, 19,034.12 and 3,924.13 is: 5,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.41 : 19,034.12 = 3,924.13 : x
  2. Step 2: Convert to fraction form
    12,689.41/19,034.12 = 3,924.13/x
  3. Step 3: Cross multiply
    12,689.41x = 19,034.12 × 3,924.13
  4. Step 4: Simplify right side
    12,689.41x = 74,692,361.32
  5. Step 5: Solve for x
    x = 74,692,361.32/12,689.41
  6. Step 6: Final answer
    x = 5,886.20

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Double scale
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Similar ratio
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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.