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Finding the Fourth Proportional to 7,940.66, 11,877.98 and 7,218.95

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Solution

The fourth proportional to 7,940.66, 11,877.98 and 7,218.95 is: 10,798.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.66 : 11,877.98 = 7,218.95 : x
  2. Step 2: Convert to fraction form
    7,940.66/11,877.98 = 7,218.95/x
  3. Step 3: Cross multiply
    7,940.66x = 11,877.98 × 7,218.95
  4. Step 4: Simplify right side
    7,940.66x = 85,746,448.24
  5. Step 5: Solve for x
    x = 85,746,448.24/7,940.66
  6. Step 6: Final answer
    x = 10,798.41

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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.