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Finding the Fourth Proportional to 19,920.69, 29,883.78 and 6,769.53

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Solution

The fourth proportional to 19,920.69, 29,883.78 and 6,769.53 is: 10,155.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.69 : 29,883.78 = 6,769.53 : x
  2. Step 2: Convert to fraction form
    19,920.69/29,883.78 = 6,769.53/x
  3. Step 3: Cross multiply
    19,920.69x = 29,883.78 × 6,769.53
  4. Step 4: Simplify right side
    19,920.69x = 202,299,145.22
  5. Step 5: Solve for x
    x = 202,299,145.22/19,920.69
  6. Step 6: Final answer
    x = 10,155.23

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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.