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Finding the Fourth Proportional to 12,679.96, 19,019.76 and 3,445.96

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Solution

The fourth proportional to 12,679.96, 19,019.76 and 3,445.96 is: 5,168.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.96 : 19,019.76 = 3,445.96 : x
  2. Step 2: Convert to fraction form
    12,679.96/19,019.76 = 3,445.96/x
  3. Step 3: Cross multiply
    12,679.96x = 19,019.76 × 3,445.96
  4. Step 4: Simplify right side
    12,679.96x = 65,541,332.17
  5. Step 5: Solve for x
    x = 65,541,332.17/12,679.96
  6. Step 6: Final answer
    x = 5,168.89

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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.