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Finding the Fourth Proportional to 12,691.74, 19,037.74 and 3,331.10

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Solution

The fourth proportional to 12,691.74, 19,037.74 and 3,331.10 is: 4,996.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.74 : 19,037.74 = 3,331.10 : x
  2. Step 2: Convert to fraction form
    12,691.74/19,037.74 = 3,331.10/x
  3. Step 3: Cross multiply
    12,691.74x = 19,037.74 × 3,331.10
  4. Step 4: Simplify right side
    12,691.74x = 63,416,615.71
  5. Step 5: Solve for x
    x = 63,416,615.71/12,691.74
  6. Step 6: Final answer
    x = 4,996.68

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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.