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Finding the Fourth Proportional to 10,806.60, 16,208.70 and 8,855.40

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Solution

The fourth proportional to 10,806.60, 16,208.70 and 8,855.40 is: 13,282.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,806.60 : 16,208.70 = 8,855.40 : x
  2. Step 2: Convert to fraction form
    10,806.60/16,208.70 = 8,855.40/x
  3. Step 3: Cross multiply
    10,806.60x = 16,208.70 × 8,855.40
  4. Step 4: Simplify right side
    10,806.60x = 143,534,521.98
  5. Step 5: Solve for x
    x = 143,534,521.98/10,806.60
  6. Step 6: Final answer
    x = 13,282.12

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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.