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Finding the Fourth Proportional to 7,387.70, 11,081.55 and 6,869.30

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Solution

The fourth proportional to 7,387.70, 11,081.55 and 6,869.30 is: 10,303.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,387.70 : 11,081.55 = 6,869.30 : x
  2. Step 2: Convert to fraction form
    7,387.70/11,081.55 = 6,869.30/x
  3. Step 3: Cross multiply
    7,387.70x = 11,081.55 × 6,869.30
  4. Step 4: Simplify right side
    7,387.70x = 76,122,491.42
  5. Step 5: Solve for x
    x = 76,122,491.42/7,387.70
  6. Step 6: Final answer
    x = 10,303.95

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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.