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Finding the Fourth Proportional to 12,489.54, 18,725.06 and 7,557.98

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Solution

The fourth proportional to 12,489.54, 18,725.06 and 7,557.98 is: 11,331.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.54 : 18,725.06 = 7,557.98 : x
  2. Step 2: Convert to fraction form
    12,489.54/18,725.06 = 7,557.98/x
  3. Step 3: Cross multiply
    12,489.54x = 18,725.06 × 7,557.98
  4. Step 4: Simplify right side
    12,489.54x = 141,523,628.98
  5. Step 5: Solve for x
    x = 141,523,628.98/12,489.54
  6. Step 6: Final answer
    x = 11,331.37

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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.