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Finding the Fourth Proportional to 7,378.70, 11,068.14 and 4,098.20

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Solution

The fourth proportional to 7,378.70, 11,068.14 and 4,098.20 is: 6,147.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,378.70 : 11,068.14 = 4,098.20 : x
  2. Step 2: Convert to fraction form
    7,378.70/11,068.14 = 4,098.20/x
  3. Step 3: Cross multiply
    7,378.70x = 11,068.14 × 4,098.20
  4. Step 4: Simplify right side
    7,378.70x = 45,359,396.01
  5. Step 5: Solve for x
    x = 45,359,396.01/7,378.70
  6. Step 6: Final answer
    x = 6,147.35

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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.