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Finding the Fourth Proportional to 12,501.40, 17,251.90 and 6,912.40

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Solution

The fourth proportional to 12,501.40, 17,251.90 and 6,912.40 is: 9,539.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,501.40 : 17,251.90 = 6,912.40 : x
  2. Step 2: Convert to fraction form
    12,501.40/17,251.90 = 6,912.40/x
  3. Step 3: Cross multiply
    12,501.40x = 17,251.90 × 6,912.40
  4. Step 4: Simplify right side
    12,501.40x = 119,252,033.56
  5. Step 5: Solve for x
    x = 119,252,033.56/12,501.40
  6. Step 6: Final answer
    x = 9,539.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.