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Finding the Fourth Proportional to 12,671.92, 19,008.96 and 3,907.72

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Solution

The fourth proportional to 12,671.92, 19,008.96 and 3,907.72 is: 5,861.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.92 : 19,008.96 = 3,907.72 : x
  2. Step 2: Convert to fraction form
    12,671.92/19,008.96 = 3,907.72/x
  3. Step 3: Cross multiply
    12,671.92x = 19,008.96 × 3,907.72
  4. Step 4: Simplify right side
    12,671.92x = 74,281,693.17
  5. Step 5: Solve for x
    x = 74,281,693.17/12,671.92
  6. Step 6: Final answer
    x = 5,861.91

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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.