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Finding the Fourth Proportional to 7,998.90, 11,998.35 and 2,155.52

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Solution

The fourth proportional to 7,998.90, 11,998.35 and 2,155.52 is: 3,233.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.90 : 11,998.35 = 2,155.52 : x
  2. Step 2: Convert to fraction form
    7,998.90/11,998.35 = 2,155.52/x
  3. Step 3: Cross multiply
    7,998.90x = 11,998.35 × 2,155.52
  4. Step 4: Simplify right side
    7,998.90x = 25,862,623.40
  5. Step 5: Solve for x
    x = 25,862,623.40/7,998.90
  6. Step 6: Final answer
    x = 3,233.27

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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.