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Finding the Fourth Proportional to 12,954.62, 19,431.93 and 3,720.62

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Solution

The fourth proportional to 12,954.62, 19,431.93 and 3,720.62 is: 5,580.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,954.62 : 19,431.93 = 3,720.62 : x
  2. Step 2: Convert to fraction form
    12,954.62/19,431.93 = 3,720.62/x
  3. Step 3: Cross multiply
    12,954.62x = 19,431.93 × 3,720.62
  4. Step 4: Simplify right side
    12,954.62x = 72,298,827.40
  5. Step 5: Solve for x
    x = 72,298,827.40/12,954.62
  6. Step 6: Final answer
    x = 5,580.93

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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.