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Finding the Fourth Proportional to 7,914.90, 11,877.03 and 2,920.80

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Solution

The fourth proportional to 7,914.90, 11,877.03 and 2,920.80 is: 4,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,914.90 : 11,877.03 = 2,920.80 : x
  2. Step 2: Convert to fraction form
    7,914.90/11,877.03 = 2,920.80/x
  3. Step 3: Cross multiply
    7,914.90x = 11,877.03 × 2,920.80
  4. Step 4: Simplify right side
    7,914.90x = 34,690,429.22
  5. Step 5: Solve for x
    x = 34,690,429.22/7,914.90
  6. Step 6: Final answer
    x = 4,382.93

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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.