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Finding the Fourth Proportional to 19,640.40, 29,462.40 and 7,951.20

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Solution

The fourth proportional to 19,640.40, 29,462.40 and 7,951.20 is: 11,927.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.40 : 29,462.40 = 7,951.20 : x
  2. Step 2: Convert to fraction form
    19,640.40/29,462.40 = 7,951.20/x
  3. Step 3: Cross multiply
    19,640.40x = 29,462.40 × 7,951.20
  4. Step 4: Simplify right side
    19,640.40x = 234,261,434.88
  5. Step 5: Solve for x
    x = 234,261,434.88/19,640.40
  6. Step 6: Final answer
    x = 11,927.53

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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.