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Finding the Fourth Proportional to 8,930.91, 13,396.95 and 2,690.67

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Solution

The fourth proportional to 8,930.91, 13,396.95 and 2,690.67 is: 4,036.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,930.91 : 13,396.95 = 2,690.67 : x
  2. Step 2: Convert to fraction form
    8,930.91/13,396.95 = 2,690.67/x
  3. Step 3: Cross multiply
    8,930.91x = 13,396.95 × 2,690.67
  4. Step 4: Simplify right side
    8,930.91x = 36,046,771.46
  5. Step 5: Solve for x
    x = 36,046,771.46/8,930.91
  6. Step 6: Final answer
    x = 4,036.18

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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.