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Finding the Fourth Proportional to 12,707.70, 19,040.46 and 8,991.48

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Solution

The fourth proportional to 12,707.70, 19,040.46 and 8,991.48 is: 13,472.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,707.70 : 19,040.46 = 8,991.48 : x
  2. Step 2: Convert to fraction form
    12,707.70/19,040.46 = 8,991.48/x
  3. Step 3: Cross multiply
    12,707.70x = 19,040.46 × 8,991.48
  4. Step 4: Simplify right side
    12,707.70x = 171,201,915.28
  5. Step 5: Solve for x
    x = 171,201,915.28/12,707.70
  6. Step 6: Final answer
    x = 13,472.30

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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.