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Finding the Fourth Proportional to 13,911.30, 20,862.79 and 7,333.90

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Solution

The fourth proportional to 13,911.30, 20,862.79 and 7,333.90 is: 10,998.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.30 : 20,862.79 = 7,333.90 : x
  2. Step 2: Convert to fraction form
    13,911.30/20,862.79 = 7,333.90/x
  3. Step 3: Cross multiply
    13,911.30x = 20,862.79 × 7,333.90
  4. Step 4: Simplify right side
    13,911.30x = 153,005,545.09
  5. Step 5: Solve for x
    x = 153,005,545.09/13,911.30
  6. Step 6: Final answer
    x = 10,998.65

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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.