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Finding the Fourth Proportional to 9,900.80, 14,829.60 and 8,806.40

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Solution

The fourth proportional to 9,900.80, 14,829.60 and 8,806.40 is: 13,190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,900.80 : 14,829.60 = 8,806.40 : x
  2. Step 2: Convert to fraction form
    9,900.80/14,829.60 = 8,806.40/x
  3. Step 3: Cross multiply
    9,900.80x = 14,829.60 × 8,806.40
  4. Step 4: Simplify right side
    9,900.80x = 130,595,389.44
  5. Step 5: Solve for x
    x = 130,595,389.44/9,900.80
  6. Step 6: Final answer
    x = 13,190.39

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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.