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Finding the Fourth Proportional to 7,418.40, 11,084.01 and 7,159.98

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Solution

The fourth proportional to 7,418.40, 11,084.01 and 7,159.98 is: 10,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.40 : 11,084.01 = 7,159.98 : x
  2. Step 2: Convert to fraction form
    7,418.40/11,084.01 = 7,159.98/x
  3. Step 3: Cross multiply
    7,418.40x = 11,084.01 × 7,159.98
  4. Step 4: Simplify right side
    7,418.40x = 79,361,289.92
  5. Step 5: Solve for x
    x = 79,361,289.92/7,418.40
  6. Step 6: Final answer
    x = 10,697.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.