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Finding the Fourth Proportional to 19,247.70, 28,865.78 and 6,765.40

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Solution

The fourth proportional to 19,247.70, 28,865.78 and 6,765.40 is: 10,146.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,247.70 : 28,865.78 = 6,765.40 : x
  2. Step 2: Convert to fraction form
    19,247.70/28,865.78 = 6,765.40/x
  3. Step 3: Cross multiply
    19,247.70x = 28,865.78 × 6,765.40
  4. Step 4: Simplify right side
    19,247.70x = 195,288,548.01
  5. Step 5: Solve for x
    x = 195,288,548.01/19,247.70
  6. Step 6: Final answer
    x = 10,146.07

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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.